Question Postfix SMTP server: errors from unknown

[quetrends]

Hi there,
I have been getting the information below for about 2 days now, can someone point me in the right direction on how to resolve it please, Thank you.

Postfix SMTP server: errors from unknown​

Transcript of session follows.

Out: 220 www.sudan-embassy.co.uk ESMTP Postfix
In: EHLO server1.niceemail.xyz
Out: 250-www.sudan-embassy.co.uk
Out: 250-PIPELINING
Out: 250-SIZE 512000000
Out: 250-ETRN
Out: 250-STARTTLS
Out: 250-AUTH DIGEST-MD5 CRAM-MD5 PLAIN LOGIN
Out: 250-ENHANCEDSTATUSCODES
Out: 250-8BITMIME
Out: 250 DSN
In: MAIL FROM:<[email protected]> BODY=8BITMIME
Out: 452 4.3.1 Insufficient system storage
In: RCPT TO:<[email protected]> NOTIFY=FAILURE
Out: 503 5.5.1 Error: need MAIL command
In: DATA
Out: 503 5.5.1 Error: need RCPT command
In: QUIT
Out: 221 2.0.0 Bye


For other details, see the local mail logfile

END.

look forward to reply please

 

[IgorG]

Out: 452 4.3.1 Insufficient system storage

Looks like there is not enough free disk space on the server. Have you checked this? Try to free up it and after that run

# plesk installer --select-release-current --reinstall-patch --upgrade-installed-components
# plesk repair mail