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Not receiving some emails on a cpanel/exim mail server?

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Not receiving some emails on a cpanel/exim mail server?

Postby Bassam » November 19th, 2015, 3:51 pm

Today I spent a few hours trying to figure out why some emails weren't coming in. So I decided to investigate this to find out what was wrong..

I used tools like:


Majority of them had errors that either said TTLs or simply couldn't connect.. Finally I found that the problem was Cpanel's "Exim Configuration Manager".

The setting "Introduce a delay into the SMTP transaction for unknown hosts and messages detected as spam." was causing the issue. Basically because of this delay the ones who are trying to email you don't get an immediate response and then stop trying. Not all mail servers quit so soon, but some do!

So to fix this simple turn off the setting from Exim Configuration Manager in your Cpanel!

Hope this helps someone save some time :lol:
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