Primary Hostname change with exim for better email delivery

jeffschips

• March 23, 2022 14:47

Hello. I hope everyone is healthy and safe. My server has a hostname as hostname.domain.com. I also have about 10 different fully qualified domain names with assocaited web pages and email campaign software. The issue is that any domain sending email is always shows primary hostname as hostname.domain.com rather than the actual domain doing the sending. For example domain.com sending email using smtp in headers will show primary hostname as hostname.a-different-domain.com I remember on a previous install of cpanel a few years back there was some exim code working with dns or something that could change the primary hostname to match the sending domain so discoverability improves. Would the brain trust here know of what those tweaks are or any way to change the primary hostname when sending email via smtp so headers display the primary hostname as domain.com insteads of hostname.domain.com? Here is some sample header code that reflects the issue at hand: X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - hostname.domain.com X-AntiAbuse: Original Domain - gmail.com X-AntiAbuse: Originator/Caller UID/GID - X-AntiAbuse: Sender Address Domain - the-domain-that-is-actually-sending.com X-Get-Message-Sender-Via: hostname.domain.com: authenticated_id: domain/from_h X-Authenticated-Sender: hostname.domain.com: sender@domain.com X-Source: X-Source-Args: /usr/bin/ea-php73 /home/cpanel-regisered-domain/public_html/domain.com/lists/admin/index.php -pprocessqueue -c /home/cpanel-registered-domain/public_html/domain.com/lists/config/config.php X-Source-Dir: Note to forum administrator: clicking the "code" link above does not insert placeholders for code but rather brings up the various list of forums.

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  Spirogg

  • March 23, 2022 21:17

  maybe this might help you ?

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  jeffschips

  • March 23, 2022 21:23

  Thank you @Sprogg. This looks like a good solution. However, is it really any different than:

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  Spirogg

  • March 23, 2022 21:28

  Thank you @Sprogg. This looks like a good solution. However, is it really any different than:

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  jeffschips

  • March 23, 2022 22:01

  On further examination I don't think will work. In that example the user has 2 ip addresses. I have one ip address shared among 10 domains. I need sending of emails from domain 1 to be associated with my single ip address, emails from domain 2 to be associated with my single IP address, etc. . . Keep in mind that 1) I can edit the file if necessary because since I control all the domains, only 2 of them have newsletters and they never send at the same time. Does that make sense?

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  quietFinn

  • March 23, 2022 22:58

  I don't think that "Primary hostname" has anything to do with "better email deliver". When you send emails from your server, they are sent from certain IP address. That IP address must resolve to a Fully Qualified Domain, and in turn, that Fully Qualified Domain must resolve to that IP address. Also that Fully Qualified Domain must be same as the HELO Exim is using when sending emails. If those are correctly set then you will have "better email delivery".

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  jeffschips

  • March 23, 2022 23:16

  Thank you @quietFinn for clarifying that for me. It's useful. So right now my server single IP address at UCEPROTECT"-Network - Spam Database Query I consistently get" No matching A-Record exists for your Reverse-DNS. DNS is INCONSISTENT" Is this all just a tempest in a teapot?

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  Spirogg

  • March 24, 2022 00:39

  I consistently get" No matching A-Record exists for your Reverse-DNS. DNS is INCONSISTENT"

  
  @jeffschips you need to ask your server hosting company to setup your reverse dns to your hostname so hostname.youdomain.com this is what I have when trying the UCEPROTECT Reverse DNS (PTR) exists and claimes to be: server1.mydomain.com Forward DNS for server1.mydoomain.com is: xxx.xxx.xxx.xx DNS is consistent. ONLY THE IP HOLDER _ OWNER can change the reverse DNS or sometimes depending on where you have your server or VPS you might have that option. I have a server with a company and I had to request all my IP's to get reverse DNS to the hostnames i use for each one. just so you know they can setup reverse DNS for 2 or more IP's to use the same reverse DNS as well so 2 of my IP's use the same hostname.mydomain.com for reverse DNS it can be 3 4 5 6 or as many as you want to have the same reverse DNS just FYI Hope that helps you - just add a support request for them to change your reverse DNS to your hostname :)

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  cPRex Jurassic Moderator

  • March 24, 2022 17:35

  I like it when everyone collaborates!

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  cPRex Jurassic Moderator

  • March 24, 2022 17:36

  @jeffschips - for the Forums issue you mention, you can follow along here as that is a known issue:

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