<html><body><div id="zimbraEditorContainer" style="font-family: arial,helvetica,sans-serif; font-size: 10pt; color: #000000" class="5"><div>Hello,<br data-mce-bogus="1"></div><div>Thank you for you answer.<br></div><div>I don't think the problem can be resolved with RBL and Whitelist/Blacklist.<br data-mce-bogus="1"></div><div>The postscreen filter at connection and the IPs used by Spammers are not rbl blacklisted (they are hidden behind good public IPs :(). The blacklist will arrive to late, when we see it and add to blacklist.<br data-mce-bogus="1"></div><div>The second problem is that use RBL for our SMTP authentified will add others problem, some our customers are in Africa and range IPs are often blacklisted.<br data-mce-bogus="1"></div><div><br data-mce-bogus="1"></div><div>ps: sorry for my poor english.<br data-mce-bogus="1"></div><div data-marker="__SIG_PRE__"><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><br></div><hr id="zwchr" data-marker="__DIVIDER__"><div data-marker="__HEADERS__"><b>De: </b>"Barry de Graaff" <info@barrydegraaff.nl><br><b>À: </b>"Justin PETERMANN" <jp@exoca.fr>, "users" <users@lists.zetalliance.org><br><b>Cc: </b>"Christophe DUBOURGET" <cd@exoca.fr>, "Flavien ALLARD" <fa@exoca.Fr><br><b>Envoyé: </b>Vendredi 9 Décembre 2022 18:03:59<br><b>Objet: </b>Re: [Users] [ Zimbra / Postfix ] limit connexion per smtp connection authentified<br></div><div><br></div><div data-marker="__QUOTED_TEXT__"><div>
<p>Maybe you can try this:
<a class="moz-txt-link-freetext" href="https://wiki.zimbra.com/wiki/Zimbra_Collaboration_Postscreen" target="_blank">https://wiki.zimbra.com/wiki/Zimbra_Collaboration_Postscreen</a><br data-mce-bogus="1"></p>
<p><br>
</p>
<div class="moz-cite-prefix">On 09/12/2022 17:14, Justin Petermann
wrote:<br>
</div>
<blockquote cite="mid:774862320.2518417.1670602494559.JavaMail.zimbra@exoca.fr">
<div style="font-family: arial, helvetica, sans-serif; font-size: 10pt; color: rgb(0, 0, 0);">
<div>Hello,<br>
</div>
<div><br>
</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>
</div>
<div><br>
</div>
<div>Postfix permit to send multiple message over one connexion
after authentification (same without, but the real problem is
with authentification).<br>
</div>
<div><br>
</div>
<div>For example :<br>
</div>
<div><br>
</div>
<div><span style="font-family: terminal, monaco;">send: 'ehlo
dante.exoca.fr\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-lab-zimbra-spam.exoca.fr\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-PIPELINING\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-SIZE 10240000\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-VRFY\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-ETRN\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-STARTTLS\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-AUTH LOGIN PLAIN\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-AUTH=LOGIN PLAIN\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-ENHANCEDSTATUSCODES\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-8BITMIME\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
b'250-DSN\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'250
CHUNKING\r\n'</span><br>
<span 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;">send: 'AUTH
PLAIN xxxXXXXXxxxx\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'235
2.7.0 Authentication successful\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (235); Msg: b'2.7.0 Authentication successful'</span><br>
<span style="font-family: terminal, monaco;">send: 'mail
FROM:<a class="moz-txt-link-rfc2396E" href="mailto:jp@lab-zimbra-spam.exoca.fr" target="_blank"><jp@lab-zimbra-spam.exoca.fr></a> size=81\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'250
2.1.0 Ok\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (250); Msg: b'2.1.0 Ok'</span><br>
<span style="font-family: terminal, monaco;">send: 'rcpt
TO:<a class="moz-txt-link-rfc2396E" href="mailto:jp@lab-zimbra-spam.exoca.fr" target="_blank"><jp@lab-zimbra-spam.exoca.fr></a>\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'250
2.1.5 Ok\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (250); Msg: b'2.1.5 Ok'</span><br>
<span style="font-family: terminal, monaco;">send:
'data\r\n'</span><br>
<span 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;">reply:
retcode (354); Msg: b'End data with
<CR><LF>.<CR><LF>'</span><br>
<span style="font-family: terminal, monaco;">data: (354,
b'End data with <CR><LF>.<CR><LF>')</span><br>
<span 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;">reply: b'250
2.0.0 Ok: queued as 15EBE83C54\r\n'</span><br>
<span 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: (250,
b'2.0.0 Ok: queued as 15EBE83C54')</span><br>
<span style="font-family: terminal, monaco;">send: 'mail
FROM:<a class="moz-txt-link-rfc2396E" href="mailto:jp@lab-zimbra-spam.exoca.fr" target="_blank"><jp@lab-zimbra-spam.exoca.fr></a> size=81\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'250
2.1.0 Ok\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (250); Msg: b'2.1.0 Ok'</span><br>
<span style="font-family: terminal, monaco;">send: 'rcpt
TO:<a class="moz-txt-link-rfc2396E" href="mailto:jp@lab-zimbra-spam.exoca.fr" target="_blank"><jp@lab-zimbra-spam.exoca.fr></a>\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'250
2.1.5 Ok\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (250); Msg: b'2.1.5 Ok'</span><br>
<span style="font-family: terminal, monaco;">send:
'data\r\n'</span><br>
<span 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;">reply:
retcode (354); Msg: b'End data with
<CR><LF>.<CR><LF>'</span><br>
<span style="font-family: terminal, monaco;">data: (354,
b'End data with <CR><LF>.<CR><LF>')</span><br>
<span 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;">reply: b'250
2.0.0 Ok: queued as 18A7A83C59\r\n'</span><br>
<span 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: (250,
b'2.0.0 Ok: queued as 18A7A83C59')</span><br>
<span style="font-family: terminal, monaco;">send: 'mail
FROM:<a class="moz-txt-link-rfc2396E" href="mailto:jp@lab-zimbra-spam.exoca.fr" target="_blank"><jp@lab-zimbra-spam.exoca.fr></a> size=81\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'250
2.1.0 Ok\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (250); Msg: b'2.1.0 Ok'</span><br>
<span style="font-family: terminal, monaco;">send: 'rcpt
TO:<a class="moz-txt-link-rfc2396E" href="mailto:jp@lab-zimbra-spam.exoca.fr" target="_blank"><jp@lab-zimbra-spam.exoca.fr></a>\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'250
2.1.5 Ok\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (250); Msg: b'2.1.5 Ok'</span><br>
<span style="font-family: terminal, monaco;">send:
'data\r\n'</span><br>
<span 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;">reply:
retcode (354); Msg: b'End data with
<CR><LF>.<CR><LF>'</span><br>
<span style="font-family: terminal, monaco;">data: (354,
b'End data with <CR><LF>.<CR><LF>')</span><br>
<span 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;">reply: b'250
2.0.0 Ok: queued as 1B22E83C60\r\n'</span><br>
<span 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: (250,
b'2.0.0 Ok: queued as 1B22E83C60')</span><br>
<span style="font-family: terminal, monaco;">send:
'quit\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply: b'221
2.0.0 Bye\r\n'</span><br>
<span style="font-family: terminal, monaco;">reply:
retcode (221); Msg: b'2.0.0 Bye'</span><br>
</div>
<div><span style="font-family: terminal, monaco;"><br>
</span></div>
<div><span style="font-family: arial, helvetica, sans-serif;">You
can try this python code :<br>
</span></div>
<div><span style="font-family: terminal, monaco;"><br>
</span></div>
<div>
<div style="color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: menlo, monaco, "courier new", monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;"><div><span style="color: rgb(106, 153, 85);">#!/usr/bin/env python3</span></div>
<div><span style="color: rgb(197, 134, 192);">import</span><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(78, 201, 176);">smtplib</span></div><div><span style="color: rgb(197, 134, 192);">import</span><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(78, 201, 176);">time</span></div><div><span style="color: rgb(197, 134, 192);">import</span><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(78, 201, 176);">datetime</span></div></div>
<div style="color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: menlo, monaco, "courier new", monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;">
</div>
<div style="color: rgb(212, 212, 212); background-color: rgb(30, 30, 30); font-family: menlo, monaco, "courier new", monospace; font-weight: normal; font-size: 11px; line-height: 17px; white-space: pre;">host = '<span style="color: rgb(206, 145, 120);">lab-zimbra-spam.exoca.fr</span>'
<div><span style="color: rgb(156, 220, 254);">username</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(206, 145, 120);">'<a class="moz-txt-link-abbreviated" href="mailto:jp@lab-zimbra-spam.exoca.fr" target="_blank">jp@lab-zimbra-spam.exoca.fr</a>'</span></div><div><span style="color: rgb(156, 220, 254);">password</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(206, 145, 120);">'xxxXXXXxxxx'</span></div>
<div><span style="color: rgb(156, 220, 254);">fromaddr</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(156, 220, 254);">username</span></div><div><span style="color: rgb(156, 220, 254);">toaddrs</span><span style="color: rgb(212, 212, 212);"> = [</span><span style="color: rgb(156, 220, 254);">username</span><span style="color: rgb(212, 212, 212);">]</span></div>
<div><span style="color: rgb(156, 220, 254);">server</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(78, 201, 176);">smtplib</span><span style="color: rgb(212, 212, 212);">.</span><span style="color: rgb(78, 201, 176);">SMTP</span><span style="color: rgb(212, 212, 212);">(</span><span style="color: rgb(206, 145, 120);">f"{host}:587"</span><span style="color: rgb(212, 212, 212);">)</span></div><div><span style="color: rgb(106, 153, 85);">#server.starttls()</span></div><div><span style="color: rgb(106, 153, 85);">#server = smtplib.SMTP_SSL(<span style="color: rgb(206, 145, 120);">f"{host}:465"</span>)</span></div>
<div><span style="color: rgb(156, 220, 254);">server</span><span style="color: rgb(212, 212, 212);">.</span><span style="color: rgb(220, 220, 170);">set_debuglevel</span><span style="color: rgb(212, 212, 212);">(</span><span style="color: rgb(181, 206, 168);">1</span><span style="color: rgb(212, 212, 212);">)</span></div><div><span style="color: rgb(156, 220, 254);">server</span><span style="color: rgb(212, 212, 212);">.</span><span style="color: rgb(220, 220, 170);">login</span><span style="color: rgb(212, 212, 212);">(</span><span style="color: rgb(156, 220, 254);">username</span><span style="color: rgb(212, 212, 212);">, </span><span style="color: rgb(156, 220, 254);">password</span><span style="color: rgb(212, 212, 212);">)</span></div>
<div><span style="color: rgb(156, 220, 254);">count</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(181, 206, 168);">3</span></div><div><span style="color: rgb(156, 220, 254);">pool</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(78, 201, 176);">datetime</span><span style="color: rgb(212, 212, 212);">.</span><span style="color: rgb(78, 201, 176);">datetime</span><span style="color: rgb(212, 212, 212);">.</span><span style="color: rgb(220, 220, 170);">now</span><span style="color: rgb(212, 212, 212);">().</span><span style="color: rgb(220, 220, 170);">isoformat</span><span style="color: rgb(212, 212, 212);">()</span></div>
<div><span style="color: rgb(197, 134, 192);">for</span><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(156, 220, 254);">i</span><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(86, 156, 214);">in</span><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(78, 201, 176);">range</span><span style="color: rgb(212, 212, 212);">(</span><span style="color: rgb(156, 220, 254);">count</span><span style="color: rgb(212, 212, 212);">):</span></div><div><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(156, 220, 254);">subject</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(156, 220, 254);">content</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(86, 156, 214);">f</span><span style="color: rgb(206, 145, 120);">"Sended message </span><span style="color: rgb(86, 156, 214);">{</span><span style="color: rgb(156, 220, 254);">pool</span><span style="color: rgb(86, 156, 214);">}</span><span style="color: rgb(206, 145, 120);"> </span><span style="color: rgb(86, 156, 214);">{</span><span style="color: rgb(156, 220, 254);">i</span><span style="color: rgb(86, 156, 214);">}</span><span style="color: rgb(206, 145, 120);">"</span></div><div><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(156, 220, 254);">msg</span><span style="color: rgb(212, 212, 212);"> = </span><span style="color: rgb(86, 156, 214);">f</span><span style="color: rgb(206, 145, 120);">"Subject: </span><span style="color: rgb(86, 156, 214);">{</span><span style="color: rgb(156, 220, 254);">subject</span><span style="color: rgb(86, 156, 214);">}</span><span style="color: rgb(215, 186, 125);">\n\n</span><span style="color: rgb(86, 156, 214);">{</span><span style="color: rgb(156, 220, 254);">content</span><span style="color: rgb(86, 156, 214);">}</span><span style="color: rgb(206, 145, 120);">"</span></div><div><span style="color: rgb(212, 212, 212);"> </span><span style="color: rgb(156, 220, 254);">server</span><span style="color: rgb(212, 212, 212);">.</span><span style="color: rgb(220, 220, 170);">sendmail</span><span style="color: rgb(212, 212, 212);">(</span><span style="color: rgb(156, 220, 254);">fromaddr</span><span style="color: rgb(212, 212, 212);">, </span><span style="color: rgb(156, 220, 254);">toaddrs</span><span style="color: rgb(212, 212, 212);">, </span><span style="color: rgb(156, 220, 254);">msg</span><span style="color: rgb(212, 212, 212);">)</span></div>
<div><span style="color: rgb(156, 220, 254);">server</span><span style="color: rgb(212, 212, 212);">.</span><span style="color: rgb(220, 220, 170);">quit</span><span style="color: rgb(212, 212, 212);">()</span></div></div>
</div>
<div>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">in local, no
problem to send 500 emails in 3 seconds...<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">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: rgb(0, 0, 0);">It seems
that should be smtp cache connection :</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);"><a href="https://www.postfix.org/CONNECTION_CACHE_README.html" class="moz-txt-link-freetext" target="_blank">https://www.postfix.org/CONNECTION_CACHE_README.html</a><br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">But
disabling theses options do nothing:<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);"> -
smtp_connection_cache_on_demand = no<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">-
smtp_connection_cache_destinations = hotmail.com (to limit
the destination domain)<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">but also :<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">-
smtpd_client_connection_rate_limit=2<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">-
smtpd_client_message_rate_limit=2<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">the Problem
is that sould be in connection cache but the solution seems
to be elsewhere.<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">Is any body
already had this problem ? find a solution ?<br>
</p>
<p style="font-size: 10pt; font-family: "outfit", "roboto", "verdana", "arial", sans-serif; color: rgb(0, 0, 0);">best
regards,</p>
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