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TLS between MTA's?

Discussion in 'E-mail Discussion' started by akust0m, Jun 14, 2018.

  1. akust0m

    akust0m Well-Known Member

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    Hey :)

    I understand about SSL/TLS connections between client and server, but what about between MTA's?

    Will cPanel attempt to send via TLS by default to other MTA's? Will Exim in cPanel accept mail and send mail in plain text if the remote MTA doesn't support TLS for some reason?

    Is non-encrypted delivery common between MTA'S?

    Are there settings in cPanel to configure this behavior for Exim?

    Thanks in advance :)
     
  2. cPanelLauren

    cPanelLauren Forums Analyst
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    The sending MTA will connect over whichever protocol is specified by the sender's client and the receiving MTA must accept that protocol. If the sending server requests a connection over TLSv1.2 the receiving server must accept that protocol otherwise the connection is refused.

    The protocol is deemed by the client not the server, the client requests a connection over x protocol/s and the MTA facilitates that connection with the remote server.

    The only reason a non-encrypted connection would be made would be if it was requested by the client.

    You can modify the ciphers and protocols exim is able to use at WHM>>Service Configuration>>Exim Configuration Manager.

    Thanks!
     
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