1 Topic by melaleuca5 (edited by melaleuca5 2013-09-03 23:00:48)

  • melaleuca5
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Topic: (SOLVED)SASL authentication failed on sender dependent relay

I am configuring  Sender-Dependent SASL authentication

Were one user will use a smtp relay, We have most of it working exept the authentication to mailgun, we are getting.

E4A8C738106: to=<test@domain.com>, relay=smtp.mailgun.org[198.61.253.48]:587, delay=0.02, delays=0.01/0.01/0/0, dsn=4.7.0, status=deferred (SASL authentication failed; cannot authenticate to server smtp.mailgun.org[198.61.253.48]: no mechanism available)

Made sure we have cyrus-sasl-plain but still getting the error. see error below

> smtp.mailgun.org[198.61.253.48]:587: QUIT
Aug 30 14:54:23 mail postfix/smtp[23647]: < smtp.mailgun.org[198.61.253.48]:587: 220 ak47 ESMTP ready
Aug 30 14:54:23 mail postfix/smtp[23647]: > smtp.mailgun.org[198.61.253.48]:587: EHLO mail.test.com
Aug 30 14:54:23 mail postfix/smtp[23647]: < smtp.mailgun.org[198.61.253.48]:587: 250-ak47
Aug 30 14:54:23 mail postfix/smtp[23647]: < smtp.mailgun.org[198.61.253.48]:587: 250-AUTH PLAIN LOGIN
Aug 30 14:54:23 mail postfix/smtp[23647]: < smtp.mailgun.org[198.61.253.48]:587: 250-SIZE 52428800
Aug 30 14:54:23 mail postfix/smtp[23647]: < smtp.mailgun.org[198.61.253.48]:587: 250-8BITMIME
Aug 30 14:54:23 mail postfix/smtp[23647]: < smtp.mailgun.org[198.61.253.48]:587: 250-ENHANCEDSTATUSCODES
Aug 30 14:54:23 mail postfix/smtp[23647]: < smtp.mailgun.org[198.61.253.48]:587: 250 STARTTLS
Aug 30 14:54:23 mail postfix/smtp[23647]: smtp_sasl_authenticate: smtp.mailgun.org[198.61.253.48]:587: SASL mechanisms PLAIN LOGIN
Aug 30 14:54:23 mail postfix/smtp[23647]: send attr reason = SASL authentication failed; cannot authenticate to server smtp.mailgun.org[198.61.253.48]: no mechanism available

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2 Reply by ZhangHuangbin

  • ZhangHuangbin
  • ZhangHuangbin
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Re: (SOLVED)SASL authentication failed on sender dependent relay

What's the value of below two Postfix parameters?

- smtp_sasl_security_options
- smtp_sasl_mechanism_filter

Again, if you want to let others help troubleshoot Postfix issue, please post your "postconf -n".

3 Reply by melaleuca5

  • melaleuca5
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Re: (SOLVED)SASL authentication failed on sender dependent relay

This issue has been revolved.

Make sure you are using  smtp_sasl_security_options = noanonymous      Not smtpd_sasl_security_options.

After this everything started to work.