• If you are still using CentOS 7.9, it's time to convert to Alma 8 with the free centos2alma tool by Plesk or Plesk Migrator. Please let us know your experiences or concerns in this thread:
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Issue email recieved but not sent

are you receiving any bounce back emails after sending an email to a certain email ID ? mostly probably you will find the exact error in the bounce back email only.
 
Hi,

Could you describe an environment of your installation? Is this Cloud Provider? Have you got a firewall between Plesk and the Internet? Could you connect via telnet from your Plesk to any mail server on the Internet via 25/tcp port? As an example: `telnet smtp.gmail.com 25`
 
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