Emails not working after exim upgrade – VestaCP
Issue has been recorded at
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https://forum.vestacp.com/viewtopic.php?f=12&t=19994
The fix would be to downgrade the exim via terminal / SSH.
wget https://git.io/JJjHP
rpm -Uvh –oldpackage exim-4.93-3.el7.x86_64.rpm