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Some spammers use the mail from field to send email from domains that don't exist. Our old AntiSpam validated the SPF of this field that is displayed Example:

Dear, good afternoon! okay? I use Option, Configuration>Mail Proxy>Options>Use SPF (Yes). I noticed that it validates the SPF IP address of the domain specified in the "Return-Path:" field. For this reason he ended up receiving some fake emails. I would like to validate the domain SPF of the...

Good Morning! it's OK? This is very strange, the header shows that it was sent to more than 1 user. However, the log shows only one. I suspect that the client's server sends each tag separately and for some reason these were not delivered. Thanks

Good evening! Okay? What is strange, is that no header that the favorite recipient appears in all users, as sent above. Thank you very much

Mar 24 09:54:40 mx003deb10 postfix/smtpd[74180]: connect from a2i223.smtp2go.com[103.47.204.223] Mar 24 09:54:40 mx003deb10 postfix/smtpd[74180]: Anonymous TLS connection established from a2i223.smtp2go.com[103.47.204.223]: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) Mar 24...

A customer recently registered on proxmox started to report strange behavior. When receiving some e-mails from some customers with more than one e-mail in copy, only some users receive it. I’m forwarding the header of an email sent to multiple users From: <paulo@XXXXXXX.com.br> To...

Guys, good afternoon! All right? I would like to use the PROXMOX email gateway as AntiSpam for a Microsoft Exchange server, however I would like to create some rules that I am applying and it is not working. For example: In "Mail Proxy" "Options" I deactivated the option "Use SPF" because I...