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I can not get my webscript working sending out e-mails with postfix, while sending e-mails via local mail software works well.
Here's the output when the webscript is sending an e-mail:
Mar 24 11:34:50 rs2222333 postfix/smtpd[8478]: connect from rs2222333.rs.hostprovider.com[::1]
Mar 24 11:34:50 rs2222333 postfix/smtpd[8478]: NOQUEUE: reject: RCPT from rs2222333.rs.hostprovider.com[::1]: 454 4.7.1 <receiver@somedomain.com>: Relay access denied; from=<info@mydomain.com> to=<receiver@somedomain.com> proto=ESMTP helo=<localhost>
Mar 24 11:34:50 rs2222333 postfix/smtpd[8478]: disconnect from rs2222333.rs.hostprovider.com[::1]
I found only confusing or misleading answers on the internet regarding the 454 error, so I am stuck on this error message.
Also strange for me, why the automatic given hostname rs2222333.rs.hostprovider.com still appears in the error message, even I changed the hostname already, also in /etc/postfix/main.cf
.
Restarting postfix didn't help.
Is this normal? Would be nice if you could help understanding this 454 error to lead me to the right direction to fix it.