Hello all,

We have postfix mta in our office to send e-mails to multiple recipients but we send individual messages via our hosting provider. In this respect, hosting provider made below setup in their system;

mx0 = mail2.domain.com.tr (hosting provider)
mx30 = mail.domain.com.tr (office static IP and rDNS)

Now, when we send emails from office and when the recipient replies back to this message, they get below error

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his message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its recipients. This is a permanent error. The following address(es) failed:

bahadir@domain.com.tr
SMTP error from remote mail server after RCPT TO:<bahadir@domain.com.tr>:
host mail.domain.com.tr [xx.xxx.xxx.x]: 554 5.7.1 <bahadir@supramar.com.tr>:
Relay access denied
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When I checked wger.kernel.org output, below seen ;

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MAIL FROM:<>
250 2.1.0 Ok

Fine, it accepts NULL return-path as is mandated by RFC 2821 section 6.1

RSET
250 2.0.0 Ok
MAIL FROM:<postmaster@vger.kernel.org>
250 2.1.0 Ok
RCPT TO:<basar@domain.com.tr>
554 5.7.1 <basar@domain.com.tr>: Relay access denied


Something WRONG!! rc=554

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Where I do wrong ?? Pleased to hear as this is a seious matter since we dont get a part of the messaged sent to our company.

Thanks in advance