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Sender verify failed (with no error number)

Leo Carrizo
  • Edited

We facing issues about mail delivery, and account can't receive mails from 'domain.com' domain, in the Track Delivery I can see "Sender verify failed" error, after some investigations, I saw this article a possible fix yo bypass the IP:

https://support.cpanel.net/hc/en-us/articles/360054089773-How-to-whitelist-incoming-Sender-Verify-checks

where i could add the sender IP  and then the mails will we received OK, but the issue is that sender change their send IP, and again the emails are not accepted, so I could add the the new IP to EXIM, but is not scalable for me.

I'm looking for know why this domain (domain.com) are being filtered, maybe by DKIM (is not properly setting to this domain) to apply a scalable solution to entire account .

Thanks a lot! 

Comments

7 comments

Date Votes
  • cPRex Jurassic Moderator

    Hey there!  Do you have more specific data directly from within the Exim log at /var/log/exim_mainlog so we can see what is happening with the full message?

    It's also important to not share domains or IPs on the Forum so it's be to anonymize things wherever possible.

    0
  • Leo Carrizo
    • Edited

    Hi! thanks,

    this is a line form exim log

    2024-10-07 09:54:32 H=mailcl.senderdomain.net (mailch.senderdomain.net) [xx.xxx.xxx.xx]:xxxxx X=TLS1.3:TLS_AES_256_GCM_SHA384:256 CV=no F=<Documents@senderdomain.com> rejected RCPT <taller@receiptdomain.com.ar>: Sender verify failed

    sender domain fails in DKIM verification, It  would be a reason to be rejected with that error message? 

    0
  • cPRex Jurassic Moderator

    The only option that would control that would be in WHM >> Exim Configuration Manager:

    "Allow DKIM verification for incoming messages"
     
    although that doesn't quite look like that error.  Are you seeing the DKIM failure through another check manually outside of the logs?  if so, and if you have that option on, then yes, that would be a reason for the failure.
    0
  • Leo Carrizo

    Hi, i'm using tools like "mail status" or DKIM checkers online,

    altought "Allow DKIM verification" is off in my server , it should be filter domains with DKIM misconfigured? 

    0
  • cPRex Jurassic Moderator

    If that option is set to off, which is the default, your server won't be filtering incoming messaged based on a failed DKIM configuration.

    0
  • Leo Carrizo

    Sounds good, but this domain keeping being filtered,  What could be the reason? Where can I trace the error? 

    0
  • cPRex Jurassic Moderator

    At this point it would be best to create a ticket so this can be investigated directly on the system.

    0

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