Verizon blocking port 465 to godaddy?
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After removing the SASL part from the configuration, now we are getting this error:
Dec 9 18:07:09 fax postfix/smtp[29023]: BE45D434A2E: to=<...>, relay=....:**587**, delay=0.11, delays=0.02/0/0.06/0.02, dsn=5.7.1, status=bounced (host .... said: 530 5.7.1 **Client was not authenticated** (in reply to MAIL FROM command))
So from this we know that the port is correct, but that the system is not authenticating correctly.
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From what I can tell, client decided on a mail server without SASL and a relay host that requires it.
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It isn't clear in GoDaddy's documentation that they allow remote SMTP relay, but it seems like they must.
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The client machine does not have SASL, so does not support usernames/passwords at all. A bit of a problem.