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Issue Mailserver Delivery confirmation Not working proberly

superfun2k23

New Pleskian
Server operating system version
Debian 12.12
Plesk version and microupdate number
18.0.73 #3
Hi,

I have a problem, that sometimes occur with sending mail delivery confirmations failing.

The mailserver try to send the delivery confirmation to the client, but this falls:

"<client@pleskmailer>: host 127.0.0.1[127.0.0.1] said: 550 5.7.1 id=30096-07 -
Rejected by next-hop MTA on relaying, from MTA(smtp:[127.0.0.1]:10025): 550
5.7.1 Command rejected (in reply to end of DATA command)"

I use postfix and dovecat in combination with immunify+.

Whats a bit crazy, sometimes it work and sometimes not
 
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