Update alternate HELO

coursevector

• April 03, 2020 08:05

I just created a new server and it recognized the HELO as "ec2-##-##-###-###.compute-1.amazonaws.com.". I later got Amazon to properly configure the rDNS to the domain of the server (host.example.com). But now cPanel is saying that is bad: "1 unexpected PTR value exists for this IP address: host.example.com" How do I get cPanel to update the recognized alternate HELO value so it doesn't think this is a bad thing?

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  cPanelLauren

  • April 03, 2020 17:47

  What is it expecting? It should give you what it expects in the error message as well. The PTR should match the hostname as well as whatever is in /etc/mailhelo
  in most cases

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  coursevector

  • April 09, 2020 19:16

  It's been a week (been busy) but I checked again and now it's reporting correctly and says there is no issue. So maybe cPanel just caches what it expects and holds that for a while? It now properly shows "PTR" is properly configured for this domain. Name: #.###.###.##.in-addr.arpa. Value: host.example.com.

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  cPanelLauren

  • April 09, 2020 21:57

  There is a cache! I was just looking at a case earlier which references it. It's located here: /var/cpanel/ip_rdns_cache.json
  You can view the JSON with: python -mjson.tool /var/cpanel/ip_rdns_cache.json
  But there's also just: /var/cpanel/ip_rdns_cache
  

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  coursevector

  • April 09, 2020 21:58

  Ah that would make sense. thanks!

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