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Thunderbird blocks EMail send

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audio3
audio3
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I am just setting up a test-email-server. The problem is, that thunderbird does not let me semd a mail to it. I always receive the error: 

   SMTP error from remote mail server after pipelined end of data:
   550 5.7.0 bad DKIM signature data

But DKIM is correct. I can send to my mail from any other source (webmail, gmail, hotmail, outlook). What ever I tried - no error at all.

Only my local installation (thunderbird 115.6.1 64-Bit) is reacting this way. Any idea? Thx Gerald

I am just setting up a test-email-server. The problem is, that thunderbird does not let me semd a mail to it. I always receive the error: SMTP error from remote mail server after pipelined end of data: 550 5.7.0 bad DKIM signature data But DKIM is correct. I can send to my mail from any other source (webmail, gmail, hotmail, outlook). What ever I tried - no error at all. Only my local installation (thunderbird 115.6.1 64-Bit) is reacting this way. Any idea? Thx Gerald

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Matt
Matt
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what SMTP server are you trying to connect to? If it is your own, then your server is, I think, using server to server checking that is usually reserved for mail submitted on port 25 to mail you are trying to send. The issue is in the SMTP server configuration as it is what is rejecting the email.

It is many years since I ran an SMTP server of my own, so I really can't advise on specifics. But I would assume the server needs to be configured to accept new submissions on a different port to mail for delivery so they can be treated differently.