Unclear error when sending via smtp - rejected RCPT <[email protected]>: relay not permitted

unclear error when sending via smtp

rejected RCPT [email protected]: relay not permitted

although if you send it via webmail, the letter goes out normally, I need help…

I figured out this reason, the reason was that the client that connected to the mail server did not pass authorization, switched to TLS and everything worked.

Thanks to all!

p.s. Port 25 without encryption - #4 by GabrielPL

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