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Editorial Team
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Asked: 2026-05-20T22:27:21+00:00

I am facing problem on a centOS server while sending java mails. Getting the

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I am facing problem on a centOS server while sending java mails. Getting the following exception.

javax.mail.MessagingException: Could not connect to SMTP host: localhost, port: 25, response: -1

I used the following command from the command prompt and I got the mail as expected.

echo "testing" | mail -s"test subject" shantanu.oa@gmail.com

The relevant entry from maillog looks like this…

Mar 28 20:13:16 postfix/smtpd[10120]: fatal: no SASL authentication mechanisms
Mar 28 20:13:17 postfix/master[28163]: warning: process /usr/libexec/postfix/smtpd pid 10120 exit status 1
Mar 28 20:13:17 postfix/master[28163]: warning: /usr/libexec/postfix/smtpd: bad command startup -- throttling
Mar 28 20:26:22 postfix/smtpd[11001]: warning: SASL: Connect to private/auth failed: Connection refused

How do I correct the problem?

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1 Answer

  1. Editorial Team

    From the log entry

    Mar 28 20:13:16 postfix/smtpd[10120]: fatal: no SASL authentication mechanisms

    I suspect that the problem is on Postfix, of which I’m not an expert. Googling for “fatal: no SASL authentication mechanisms” gives lots of interesting links: maybe have a look here or here.

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