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Editorial Team
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Asked: 2026-06-07T05:26:47+00:00

I configured my email server following the tutorial https://help.ubuntu.com/community/PostfixDovecotSASL Now when I telnet myserver.com

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I configured my email server following the tutorial https://help.ubuntu.com/community/PostfixDovecotSASL

Now when I
telnet myserver.com 25
ehlo localhost

the output is

250-PIPELINING
250-SIZE 10240000
250-VRFY
250-ETRN
250-STARTTLS
250-AUTH PLAIN LOGIN
250-AUTH=PLAIN LOGIN
250-ENHANCEDSTATUSCODES
250-8BITMIME
250 DSN

=====
According tutorial ,”250-AUTH PLAIN LOGIN ,50-AUTH=PLAIN LOGIN” lines mean I config myserver right .
But I still sent the email without auth login .

It is weird .

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1 Answer

  1. Editorial Team

    Just like ekini says, look in your main.cf configuration file and see if mynetworks parameter is set to localhost (or 127.0.0.0/8 for instance), which is usually the case when this happens. 

     mynetworks = 127.0.0.0/8

    Also this shuld be set to yes:

    smtpd_sasl_auth_enable = yes

    Try connecting from somewhere else instead…

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