Search results

Both external and internal SMTP port cannot be the same. Change your relay mail server to use port 26 since all incoming mail will go through PMG first then redirect to your actual email server.

check out the tutorial on mail filter https://forum.proxmox.com/threads/mail-filter-example.71904/

Add the dnswl site with negative score to your DNSBL sites entry. https://www.dnswl.org/?page_id=15#postfix

Try set custom spamassassin score for dkim and spf rule and let spamassassin quarantine/block it. https://svn.apache.org/repos/asf/spamassassin/trunk/rules/25_dkim.cf https://svn.apache.org/repos/asf/spamassassin/trunk/rules/25_spf.cf

Provide more info regarding your issue, include the logs showing mails being rejected.

There is procmail but I am not sure PMG can handle it. https://wiki.archlinux.org/title/Procmail http://lists.mailscanner.info/pipermail/mailscanner/2020-April/106168.html

It work for me. This is my /etc/pmg/spamassassin/custom.cf and test email from gmail. Return-path: <user1@gmail.com> Received: from pmg.mydomain.com ([192.168.40.106]) by mail.mydomain.com with ESMTP; Tue, 13 Sep 2022 08:54:48 +0800 Received: from pmg.mydomain.com (localhost.localdomain...

Is the mail server same network segment with PMG? Try add your mail server network/cidr to trusted network.

show your global whitelist and also the log showing the mail being check with SPF.

Pls provide log and PMG version.

Whitelist under Mail Proxy will disable SPF checking. Does it work?

93.112.39.252 is being blacklisted. status=bounced (host mx-biz.mail.am0.yahoodns.net[67.195.204.83] said: 553 5.7.1 [TSS07] Connections will not be accepted from 93.112.39.252, because the ip is in Spamhaus's list; see https://postmaster.yahooinc.com/error-codes (in reply to MAIL FROM command))

welcome

Create an outgoing rule with quarantine action and filter by what/who object.

You need to set smarthost to relay outgoing through PMG. Check zimbra's documentation on how to set it up. https://wiki.zimbra.com/wiki/Sending_mail_through_an_external_relay

run systemctl restart pmg-smtp-filter in terminal to restart the service.

If not mistaken, the global whitelist will bypass SPF checking. https://pmg.proxmox.com/pmg-docs/pmg-admin-guide.html#_mail_proxy_configuration

Did you whitelist the sender IP in Mail Proxy -> Whitelist?

Try who object -> domain sendgrid.darwinbox.in. But I am not sure it is a good idea as the email from xyz.com are relaying through sendgrid.

Are you refering to Who object? If yes, it refer to Return-Path: header on your mail.