On 11.01.22 10:40, Enrico Morelli wrote:
>Dear all,
>
>sending mail to some external users I receive this error:
>
>Recipient address rejected: Message rejected due to: domain owner
>discourages use of this host. (in reply to RCPT TO command))
>
>What means?  Is the problem related to my postfix mail server?

On Tue, 11 Jan 2022 10:43:14 +0100
Matus UHLAR - fantomas <uh...@fantomas.sk> wrote:
looks liks SPF error.
hard to tell more without logs.

On 11.01.22 10:51, Enrico Morelli wrote:
The only message in mail.log are the following:

Jan 11 09:34:13 genio postfix/smtp[28088]: 6090C80922E: to=<user@domain>, 
relay=mail.remote.server[x.xxx.xx.xx]:25, delay=8.6, delays=0/0.01/7.5/1, dsn=5.7.23, 
status=bounced (host mail.remote.server[x.xxx.xx.xx] said: 550 5.7.23 <user@domain>: 
Recipient address rejected: Message rejected due to: domain owner discourages use of this 
host. (in reply to RCPT TO command))
Jan 11 09:34:13 genio postfix/smtp[28088]: 6090C80922E: 
to=<anotheruser@domain>, relay=mail.remote.server[x.xxx.xx.xx]:25, delay=8.6, 
delays=0/0.01/7.5/1, dsn=5.7.23, status=bounced (host
mail.remote.server[x.xxx.xx.xx] said: 550 5.7.23 <anotheruser@domain>:Recipient 
address rejected: Message rejected due to: domain owner discourages use of this host. 
(in reply to RCPT TO command))

the remote postfix server rejected message from you.  The message means that
sour server is not allowed to send mail from domain you send mail from.

you need to be listed in sender domain's SPF records.

--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
If Barbie is so popular, why do you have to buy her friends?

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