Introduction Lately my mail server started to get refusals of emails from large mailing systems like AOL, Yahoo etc. I can’t blame them for trying to minimize the SPAMS to their clients. Although using an approved relay service is a good solution, if you want to take care of it yourself here is OpenDKIM at …

Lately I’ve been confronted with the following error messages from my Postfix server form AOL, Verizon or AT&T: VERIZON: ‘blocked by Verizon Online’s anti-spam system… AOL: refused to talk to me: 554- (RTR:BL)…. AT&T: blocked by ldap:ou=rblmx,dc=att,dc=net…. Moreover after trying to get my server on the whitelist it seemed almost impossible or quite a long …

I set-up dovecot as mail pic-up server for IMAP and POP3. If I left my webmail(roundcube) interface running on my browser, I experienced very often that as soon as I started an Apple mail product (iPad,iPhone or Mail on OSX the IMAP complained that my login failed and asked for typing my password. Normally the …

This configuration is made to respond to each incoming email by an automated message. It is inspired from the site: http://www.akadia.com/services/automatic_email_answering.html In Debian: Install the package vacation apt-get install vacation Assumptions: System User: marie Email address: marie.larue@myserver.com Configuration: Initialize the database file ~/.vacation.db sudo -u marie vacation -I Create the following 2 files in the …

Reference: The following Tip is been taken from the following forum: http://www.howtoforge.com/forums/archive/index.php/t-4788.html Description: Some ISPs, for some strange reasons, are blocking the port 25, therefore preventing many normal email clients software from picking-up their emails from other mail servers than their own ISP’s server. Solution: Making sure Postfix on your mail server listens on both …