Postfix configuration

By Guest
in Linux

 Share

Recommended Posts

Guest

Posted
Posted

I am trying to setup a backup postfix mail server for a few domains. I tested this at home with a personal domain and have it working fine. I've now come to build the server at my office where I have replicated the configuration. Upon testing all email for each domain bounces back stating...

"mail for domain.com loops back to myself"

The test box still works (I followed the guide from here) so I have been trying to compare configuration but haven't been able to find the answer. A lot of other sites mention the fact you need entries in the "transport" file which when testing does indeed work. This means though for every domain I plan to look after I now need to edit two files and run the command to turn the file into a binary. I also need to watch for changes my customers make to their DNS records. My test server doesn't use the transport file at all and is working as needed. It solely uses DNS to work out an MX that accepts mail for this domain.

Hopefully someone can tell me what's wrong with my production server's config...

Production Server:

alias_database = $alias_maps
alias_maps = hash:/etc/postfix/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
html_directory = no
mail_owner = postfix
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
mynetworks_style = subnet
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = no
relay_domains = $mydestination, domain.com
relay_recipient_maps =
sample_directory = /etc/postfix/sample
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, permit_mx_backup
unknown_local_recipient_reject_code = 550

Test Server: 

alias_database = $alias_maps
alias_maps = hash:/etc/postfix/aliases
command_directory = /usr/sbin
config_directory = /etc/postfix
daemon_directory = /usr/lib/postfix
data_directory = /var/lib/postfix
debug_peer_level = 2
html_directory = no
mail_owner = postfix
mailq_path = /usr/bin/mailq
manpage_directory = /usr/share/man
mynetworks_style = subnet
newaliases_path = /usr/bin/newaliases
queue_directory = /var/spool/postfix
readme_directory = no
relay_domains = $mydestination, domain.com
relay_recipient_maps =
sample_directory = /etc/postfix/sample
sendmail_path = /usr/sbin/sendmail
setgid_group = postdrop
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination, permit_mx_backup
unknown_local_recipient_reject_code = 550

If you need anything else, let me know cause right now I am very lost. :(

Link to comment
https://www.neowin.net/forum/topic/664344-postfix-configuration/
Share on other sites
This topic is now closed to further replies.
 Share
Go to topic listing

  • Recently Browsing   0 members

    • No registered users viewing this page.

  • Posts

    • Can't access the forum on mobile

      By Mindovermaster · Posted

      I'm not aware of this issue, but to help the other guys.  What version of Android are you using? Did you try a different browser? To see if Edge is the issue here.
    • Windows 11's big performance boost is finally available for all

      By +Good Bot, Bad Bot · Posted

      I agree when are you going to read this (really poor BTW) article? Here is a better article so you actually know what is going on and answers questions you had in other comments --> https://arstechnica.com/gadgets/2026/05/speed-boosting-low-latency-profile-is-one-of-the-improvements-coming-to-windows-11/ It is unclear if one will be able to disable the new profile at this point but I am not seeing any reason why one would.
    • Euro-Office must default to ODF to be considered "genuinely European", LibreOffice argues

      By Snake Doc · Posted

      I disagree; they come off very "bitchy" and "whiny". Make a great product and combine that with a great price (free) and people will come over to your side. Or build it and they will come as they say. Constantly trying to get attention by complaining all the time, will turn people off to your product.
    • Euro-Office must default to ODF to be considered "genuinely European", LibreOffice argues

      By +Eternal Tempest · Posted

      It use to be a nightmare, with LibreOffice supporting a newer draft ODF standard by default, and Microsoft Office supporting the older non-draft standard. Now that they both support the same version of ODF, they should be interoperable.
    • Brave Browser 1.91.171

      By Copernic · Posted

      Brave Browser 1.91.171 by Razvan Serea Brave Browser is a lightning-fast, secure web browser that stands out from the competition with its focus on privacy, security, and speed. With features like HTTPS Everywhere and built-in tracker blocking, Brave keeps your online activities safe from prying eyes. Brave is one of the safest browsers on the market today. It blocks third-party data storage. It protects from browser fingerprinting. And it does all this by default. Speed - Brave is built on Chromium, the same technology that powers Google Chrome, and is optimized for speed, providing a fast and responsive browsing experience. Brave Browser also features Brave Rewards, a system that rewards users with Basic Attention Tokens (BAT) for viewing opt-in ads. This innovative system provides an alternative revenue model for content creators and a way to support the Brave community. SlimBrave Neo takes all the good things about Brave and makes them even better by keeping everything clean, light, and privacy-focused. It removes the extra clutter, turns off features you might not need, and cuts down on anything that could slow you down or collect unnecessary data. Because it relies on simple settings and policies instead of modifying the browser itself, you still get full Brave compatibility—just in a smoother, lighter, and more privacy-friendly package. Brave Browser 1.91.171 changelog: General Fixed Cardano not being disabled on upgrade to Brave Origin. Upgraded Chromium to 149.0.7827.103. Origin Removed “Survey Panelist” setting from brave://settings/privacy. Fixed P3A and usage ping under brave://settings/privacy being displayed on first launch on Linux. Upgraded Chromium to 149.0.7827.103. Download: Brave Browser 64-bit | 1.2 MB (Freeware) Download: Brave Browser 32-bit View: Brave Homepage | Offline Installers | Screenshot Get alerted to all of our Software updates on Twitter at @NeowinSoftware

  • Recent Achievements

    • One Month Later
      Jamswaz earned a badge
      One Month Later
    • Week One Done
      Jamswaz earned a badge
      Week One Done
    • Rookie
      Marzoid went up a rank
      Rookie
    • Community Regular
      coch went up a rank
      Community Regular
    • One Year In
      slackerzz earned a badge
      One Year In

  • Popular Contributors

    1. 1
      +primortal
      517
    2. 2
      PsYcHoKiLLa
      189
    3. 3
      +Edouard
      156
    4. 4
      Steven P.
      84
    5. 5
      ATLien_0
      75
    Show More

  • Tell a friend

    Love Neowin? Tell a friend!