<html><body><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000"><div>Hello,<br></div><div><br data-mce-bogus="1"></div><div>We have a recurrent problem with corrupted password account over smtp. (2 times after a f..king phishing last week, IPs reputation take a lot)<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>Postfix permit to send multiple message over one connexion after authentification (same without, but the real problem is with authentification).<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>For example :<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'ehlo dante.exoca.fr\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-lab-zimbra-spam.exoca.fr\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-PIPELINING\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-SIZE 10240000\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-VRFY\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-ETRN\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-STARTTLS\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-AUTH LOGIN PLAIN\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-AUTH=LOGIN PLAIN\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-ENHANCEDSTATUSCODES\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-8BITMIME\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250-DSN\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 CHUNKING\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'lab-zimbra-spam.exoca.fr\nPIPELINING\nSIZE 10240000\nVRFY\nETRN\nSTARTTLS\nAUTH LOGIN PLAIN\nAUTH=LOGIN PLAIN\nENHANCEDSTATUSCODES\n8BITMIME\nDSN\nCHUNKING'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'AUTH PLAIN xxxXXXXXxxxx\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'235 2.7.0 Authentication successful\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (235); Msg: b'2.7.0 Authentication successful'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'mail FROM:<jp@lab-zimbra-spam.exoca.fr> size=81\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.1.0 Ok\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.1.0 Ok'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'rcpt TO:<jp@lab-zimbra-spam.exoca.fr>\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.1.5 Ok\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.1.5 Ok'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'data\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'354 End data with <CR><LF>.<CR><LF>\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (354); Msg: b'End data with <CR><LF>.<CR><LF>'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">data: (354, b'End data with <CR><LF>.<CR><LF>')</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: b'Subject: Envoi 2022-12-09T16:33:40.031235 0\r\n\r\nEnvoi 2022-12-09T16:33:40.031235 0\r\n.\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.0.0 Ok: queued as 15EBE83C54\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.0.0 Ok: queued as 15EBE83C54'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">data: (250, b'2.0.0 Ok: queued as 15EBE83C54')</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'mail FROM:<jp@lab-zimbra-spam.exoca.fr> size=81\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.1.0 Ok\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.1.0 Ok'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'rcpt TO:<jp@lab-zimbra-spam.exoca.fr>\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.1.5 Ok\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.1.5 Ok'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'data\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'354 End data with <CR><LF>.<CR><LF>\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (354); Msg: b'End data with <CR><LF>.<CR><LF>'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">data: (354, b'End data with <CR><LF>.<CR><LF>')</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: b'Subject: Envoi 2022-12-09T16:33:40.031235 1\r\n\r\nEnvoi 2022-12-09T16:33:40.031235 1\r\n.\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.0.0 Ok: queued as 18A7A83C59\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.0.0 Ok: queued as 18A7A83C59'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">data: (250, b'2.0.0 Ok: queued as 18A7A83C59')</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'mail FROM:<jp@lab-zimbra-spam.exoca.fr> size=81\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.1.0 Ok\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.1.0 Ok'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'rcpt TO:<jp@lab-zimbra-spam.exoca.fr>\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.1.5 Ok\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.1.5 Ok'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'data\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'354 End data with <CR><LF>.<CR><LF>\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (354); Msg: b'End data with <CR><LF>.<CR><LF>'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">data: (354, b'End data with <CR><LF>.<CR><LF>')</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: b'Subject: Envoi 2022-12-09T16:33:40.031235 2\r\n\r\nEnvoi 2022-12-09T16:33:40.031235 2\r\n.\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'250 2.0.0 Ok: queued as 1B22E83C60\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (250); Msg: b'2.0.0 Ok: queued as 1B22E83C60'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">data: (250, b'2.0.0 Ok: queued as 1B22E83C60')</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">send: 'quit\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: b'221 2.0.0 Bye\r\n'</span><br><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;">reply: retcode (221); Msg: b'2.0.0 Bye'</span><br data-mce-bogus="1"></div><div><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;"><br data-mce-bogus="1"></span></div><div><span style="font-family: arial, helvetica, sans-serif;" data-mce-style="font-family: arial, helvetica, sans-serif;">You can try this python code :<br data-mce-bogus="1"></span></div><div><span style="font-family: terminal, monaco;" data-mce-style="font-family: terminal, monaco;"><br data-mce-bogus="1"></span></div><div><div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;" data-mce-style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;"><div><span style="color: #6a9955;" data-mce-style="color: #6a9955;">#!/usr/bin/env python3</span></div><br><div><span style="color: #c586c0;" data-mce-style="color: #c586c0;">import</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">smtplib</span></div><div><span style="color: #c586c0;" data-mce-style="color: #c586c0;">import</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">time</span></div><div><span style="color: #c586c0;" data-mce-style="color: #c586c0;">import</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">datetime</span></div></div><div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;" data-mce-style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;"><br data-mce-bogus="1"></div><div style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;" data-mce-style="color: #d4d4d4; background-color: #1e1e1e; font-family: Menlo, Monaco, 'Courier New', monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;">host = '<span style="color: #ce9178;" data-mce-style="color: #ce9178;">lab-zimbra-spam.exoca.fr</span>'<br><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">username</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #ce9178;" data-mce-style="color: #ce9178;">'jp@lab-zimbra-spam.exoca.fr'</span></div><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">password</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #ce9178;" data-mce-style="color: #ce9178;">'xxxXXXXxxxx'</span></div><br><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">fromaddr</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">username</span></div><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">toaddrs</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = [</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">username</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">]</span></div><br><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">server</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">smtplib</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">.</span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">SMTP</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">(</span><span style="color: #ce9178;" data-mce-style="color: #ce9178;">f"{host}:587"</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">)</span></div><div><span style="color: #6a9955;" data-mce-style="color: #6a9955;">#server.starttls()</span></div><div><span style="color: #6a9955;" data-mce-style="color: #6a9955;">#server = smtplib.SMTP_SSL(<span style="color: #ce9178;" data-mce-style="color: #ce9178;">f"{host}:465"</span>)</span></div><br><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">server</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">.</span><span style="color: #dcdcaa;" data-mce-style="color: #dcdcaa;">set_debuglevel</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">(</span><span style="color: #b5cea8;" data-mce-style="color: #b5cea8;">1</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">)</span></div><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">server</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">.</span><span style="color: #dcdcaa;" data-mce-style="color: #dcdcaa;">login</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">(</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">username</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">, </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">password</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">)</span></div><br><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">count</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #b5cea8;" data-mce-style="color: #b5cea8;">3</span></div><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">pool</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">datetime</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">.</span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">datetime</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">.</span><span style="color: #dcdcaa;" data-mce-style="color: #dcdcaa;">now</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">().</span><span style="color: #dcdcaa;" data-mce-style="color: #dcdcaa;">isoformat</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">()</span></div><br><div><span style="color: #c586c0;" data-mce-style="color: #c586c0;">for</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">i</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">in</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #4ec9b0;" data-mce-style="color: #4ec9b0;">range</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">(</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">count</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">):</span></div><div><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">subject</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">content</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">f</span><span style="color: #ce9178;" data-mce-style="color: #ce9178;">"Sended message </span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">{</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">pool</span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">}</span><span style="color: #ce9178;" data-mce-style="color: #ce9178;"> </span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">{</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">i</span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">}</span><span style="color: #ce9178;" data-mce-style="color: #ce9178;">"</span></div><div><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">msg</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> = </span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">f</span><span style="color: #ce9178;" data-mce-style="color: #ce9178;">"Subject: </span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">{</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">subject</span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">}</span><span style="color: #d7ba7d;" data-mce-style="color: #d7ba7d;">\n\n</span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">{</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">content</span><span style="color: #569cd6;" data-mce-style="color: #569cd6;">}</span><span style="color: #ce9178;" data-mce-style="color: #ce9178;">"</span></div><div><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;"> </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">server</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">.</span><span style="color: #dcdcaa;" data-mce-style="color: #dcdcaa;">sendmail</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">(</span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">fromaddr</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">, </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">toaddrs</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">, </span><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">msg</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">)</span></div><br><div><span style="color: #9cdcfe;" data-mce-style="color: #9cdcfe;">server</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">.</span><span style="color: #dcdcaa;" data-mce-style="color: #dcdcaa;">quit</span><span style="color: #d4d4d4;" data-mce-style="color: #d4d4d4;">()</span></div></div></div><div data-marker="__SIG_PRE__"><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">in local, no problem to send 500 emails in 3 seconds...<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">Like is an only one connexion, after the connexion and auth done, auth is not need. Lock account do nothing. The tcp connexion is established so blacklist IP from firewall do nothing. we must do a "zmmtactl stop" and "zmmtactl start" (zmmtactl reload don't kill the connection). We could certainly make a postfix stop / start.</p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">It seems that should be smtp cache connection :</p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000"><a href="https://www.postfix.org/CONNECTION_CACHE_README.html">https://www.postfix.org/CONNECTION_CACHE_README.html</a><br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">But disabling theses options do nothing:<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000"> - smtp_connection_cache_on_demand = no<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">- smtp_connection_cache_destinations = hotmail.com (to limit the destination domain)<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">but also :<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">- smtpd_client_connection_rate_limit=2<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">- smtpd_client_message_rate_limit=2<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">the Problem is that sould be in connection cache but the solution seems to be elsewhere.<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">Is any body already as this problem ? find a solution ?<br data-mce-bogus="1"></p><p style="font-size:10pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000000">best regards,</p><table style="font-size:13.3333px;font-family:'outfit' , 'roboto' , 'verdana' , 'arial';border-collapse:collapse" cellspacing="0" cellpadding="0" border="0"><tbody><tr><td style="width:30px"> </td><td style="width:81pt;padding:0px 6pt 0px 0px" width="108" valign="top"><a href="https://www.exoca.fr" rel="noopener nofollow noopener noreferrer" target="_blank"><img src="https://www.exoca.fr/EXOCA-signature-x2.png?v=1" style="width:226px;height:auto" data-mce-src="https://www.exoca.fr/EXOCA-signature-x2.png?v=1" width="226" height="180"></a><br></td><td style="width:259.2pt;padding:0px 11.25pt 0px 6pt" width="346" valign="top"><div style="margin:0px;line-height:8pt"><span style="font-size:2pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#333333"> </span></div><div style="margin:0px;line-height:14pt"><span style="font-size:14pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#3d0d00">Justin<br><strong>PETERMANN</strong></span></div><div style="margin:0px;line-height:8pt"><span style="font-size:2pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#333333"> </span></div><div style="margin:0px;line-height:11pt"><span style="color:#fa8a03;font-size:9pt"><span style="font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif">Développement web & Services hébergés</span></span><span style="font-size:9pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000001"><br><a style="font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;font-size:9pt;text-decoration:none;color:#000001" href="https://www.google.com/maps/place/EXOCA+-+Solutions+Web+et+H%C3%A9bergement/@49.8941485,2.3065799,15z/data=!4m5!3m4!1s0x0:0x6c8a0774bc1607ff!8m2!3d49.8941485!4d2.3065799" rel="noopener nofollow noopener noreferrer" target="_blank">8/10, rue Jean XXIII, 80000 AMIENS</a></span><br></div><div style="margin:0px;line-height:8pt"><span style="font-size:2pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#333333"> </span></div><div style="margin:0px;line-height:11pt"><span style="font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#000001;font-size:9pt"><a style="font-size:9pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#333333;text-decoration:none">+33(0)3 22 22 05 85 /</a> <a style="font-size:9pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#333333;text-decoration:none">+33(0)6 61 25 76 06</a><br><a href="mailto:%20jp@exoca.fr" style="font-size:9pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#333333;text-decoration:none" rel="noopener nofollow noopener noreferrer" target="_blank">jp@exoca.fr</a><br><a href="https://www.exoca.fr" style="font-size:9pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#333333;text-decoration:none" rel="noopener nofollow noopener noreferrer" target="_blank">www.exoca.fr</a></span><br></div></td></tr></tbody></table><p style="font-size:8pt;font-family:'outfit' , 'roboto' , 'verdana' , 'arial' , sans-serif;color:#3d0d00">Les e-mails que je pourrais envoyer pendant les périodes de repos ou de congés ne requiàrent pas de réponse immédiate.<br>Ce message et toutes les pièces jointes sont établis à l'attention exclusive de ses destinataires et sont confidentiels.<br>Si vous recevez ce message par erreur, merci de le détruire et d'en avertir immédiatement l'expéditeur.</p></div></div></body></html>