Port 25 works - 587 Does not SMTP

Discussion in '3CX Phone System - General' started by NUWELLEPIC, Mar 2, 2017.

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  1. NUWELLEPIC

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    So we are setting up an on premise server. We are relaying email to our Mail Enable server. If I un-check TLS/SSL and dont use a user name or password, mail is sent from 3CX. Fine, that is expected.

    If I check TLS/SSL, I get a message that the operation was cancelled. I get this with or without authentication.

    I setup an SMTP relay on the same windows box that runs 3CX and I can get email to relay just fine but when I send an invite, I get the following error. "smtp;554 5.6.1 Body type not supported by Remote Host"

    My research indicates the SMTP relay server doesn't like the HTML.

    I see a lot of people having success with Gmail Relay but I really dont want to go that route.

    I am ready to go out and play in traffic unless someone else has some ideas.
     
  2. leejor

    leejor Well-Known Member

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    I'm not clear on the issue.
    Are you trying to use a "format" that is not supported by your SMTP server, yet expecting it to work?
     
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