Using cleanup service to strip headers

Hi, I have postfix-3.5.2 on fedora and trying to strip internal submission headers using the cleanup service and can't get it working. In master.cf: auth-cleanup unix n - - - 0 cleanup -o syslog_name=postfix/auth-cleanup -o header_checks=pcre:/etc/postfix/aut

Forwarding best practices

Hi, I have a postfix-3.4.10 system being used as a relay for a subdomain where most users are forwarding their mail through it instead of sending and receiving email on it directly using a ~/.forward file and procmail. Users can send and receive mail using their desktop email client connected thro

Building recipient maps from Exchange/O365

Hi, Is it possible for postfix to directly access the email addresses or userlist from an Exchange server using either LDAP or AD? Perhaps someone has an external script that can be used to build the recipient maps? The results from my search have produced only other people looking unsuccessfully

Re: Mail forwarding through a relay

Hi, On Thu, Sep 12, 2019 at 3:14 AM Chris Wedgwood wrote: > > I have a postfix-3.2.6 system that acts as a mail server and > > pop/imap using dovecot for a small domain. The problem is that > > people are increasingly using it as a relay to a personal account, > > such as Gmail and Yahoo. > > pe

Mail forwarding through a relay

Hi, I have a postfix-3.2.6 system that acts as a mail server and pop/imap using dovecot for a small domain. The problem is that people are increasingly using it as a relay to a personal account, such as Gmail and Yahoo. This is resulting in the receiving system rejecting the message due to SPF fa

Forwarding mail through a gateway

Hi, I have a postfix-3.2.6 with fedora30 configured as an imap system for a subdomain that also relays mail for a few thousand users. Many users simply create a ~/.forward entry that forwards their mail through the system to a GMail account. I believe this has created some issues with reputation,