[Users] September 29, 2020 Zeta Alliance Conference Call Summary

[Randy Leiker]

Hello Zeta Alliance Community, 

Here is a summary of this week’s conference call. A few brief reminders: 


    * Conference calls are every Tuesday and open to all using either the FreeConferenceCall.com VoIP app or via a dial-in number: [ https://www.freeconferencecall.com/wall/zetalliance | https://www.freeconferencecall.com/wall/zetalliance ] 
    * Each week’s call agenda can be found at: [ https://docs.google.com/document/d/1uUUDJpwp2CAylU6lxtbEdVcUX_qSbciyes6gLTWw2fY/edit | https://docs.google.com/document/d/1uUUDJpwp2CAylU6lxtbEdVcUX_qSbciyes6gLTWw2fY/edit ] 
    * A copy of each week’s summary is also posted to the Zimbra Forums: 
        * All Earlier Months: [ https://forums.zimbra.org/viewforum.php?f=9 | https://forums.zimbra.org/viewforum.php?f=9 ] 
        * August 2020 : [ https://forums.zimbra.org/viewtopic.php?f=9&t=68589 ] [ https://forums.zimbra.org/viewtopic.php?f=9&t=68589 | https://forums.zimbra.org/viewtopic.php?f=9&t=68589 ] 
        * September 2020 : [ https://forums.zimbra.org/viewtopic.php?f=9&t=68705 | https://forums.zimbra.org/viewtopic.php?f=9&t=68705 ] 
    * Constructive feedback on these call summaries is always welcome. 
September 29, 2020 

Backing Up Zimbra To An External Endpoint 
Mark S. asked about using the new backup to an external endpoint feature, as described for an August release at [ https://www.zextras.com/roadmap-2020 | https://www.zextras.com/roadmap-2020 ] . This allows for backing up Zimbra mailboxes to object storage, rather than only block storage. He said he could not find any documentation on how to use this feature. John E. said this is targeted for Zextras release 3.1.2, which is expected to appear in 8.8.15 Patch 14 and 9.0 Patch 7. Cine said documentation should become available once released as part of the patches. 

Anti-Spam/Anti-Malware Suggestions 
David M. asked what everyone is using for anti-spam/anti-malware filtering. He said he is currently using a Barracuda appliance, but is looking for something more economical as Barracuda’s licensing costs have recently increased. He commented that he is looking at Proxmox’s Mail Gateway ( [ https://proxmox.com/en/proxmox-mail-gateway | https://proxmox.com/en/proxmox-mail-gateway ] ) which matches several of the features available in the Barracuda. Gary C. said he is using Baruwa Enterprise ( [ https://www.baruwa.com/ | https://www.baruwa.com ] ) edition. Cine said he met the Proxmox guys a few years ago and found them to be very practical and pragmatic with their approach to mail filtering. They told Cine that they are not trying to re-invent the wheel, but to make the wheel spin faster, as most everything Proxmox does can be done manually through other open source tools. Mark S. asked if there were any spam/malware filtering features not available in Zimbra that are available in Proxmox. David M. said not that he knows of, but he had only encountered a few limitations in Proxmox related to some flexibility with spam scoring, and that he wanted to avoid placing anti-spam/anti-malware filtering load on his Zimbra servers. However, Proxmox looked very promising. Mark S. added that in his blog ( [ https://www.missioncriticalemail.com/blog/ | https://www.missioncriticalemail.com/blog/ ] ), the anti-spam page is the most popular page on his web site. He said this page is updated periodically, and said he subscribed to Spamhaus, based on learning how things worked more effectively with Zimbra. 

False Positive Spam Messages 
Gary C. asked if anyone had noticed a recent increase in inbound legitimate messages being incorrectly identified as spam. He cited an example of a legitimate notification from FedEx that was classified as spam after many years of no issues with this sender. Mark S. commented that it could be users incorrectly using the ‘Mark As Spam/Junk’ button for legitimate commercial email that may be polluting Gary’s Bayesian database. Randy L. suggested that if the Bayes rules are consistently affecting legitimate email scoring negatively, that Gary may need to dump his Bayes database, in case it has been tainted, and start with a fresh database. This might cause spam levels to temporarily rise for about a week until users can submit more email for training. 


Randy Leiker ( randy at skywaynetworks.com ) 
Skyway Networks, LLC 

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.zetalliance.org/pipermail/users_lists.zetalliance.org/attachments/20201007/6375a57f/attachment.html>