501 Domain must resolve (in reply to MAIL FROM command)

Discuss your pilot or production implementation with other Zimbra admins or our engineers.
arto
Posts: 28
Joined: Sat Sep 13, 2014 12:05 am

501 Domain must resolve (in reply to MAIL FROM command)

Postby arto » Tue Jan 22, 2013 4:01 am

Hi.
We have an error with a various domains with sending e-mails. Our server returns with the message :
Jan 22 10:15:00 correu postfix/smtp[5100]: 5F17239EC02C: to=, relay=mail.tenisgimeno.com[86.109.125.213]:25, delay=0.18, delays=0/0/0.1/0.07, dsn=5.0.0, status=bounced (host mail.tenisgimeno.com[86.109.125.213] said: 501 Domain must resolve (in reply to MAIL FROM command))
I don't know what is the problem. Any idea?


phoenix
Ambassador
Ambassador
Posts: 26727
Joined: Fri Sep 12, 2014 9:56 pm
Location: Liverpool, England

501 Domain must resolve (in reply to MAIL FROM command)

Postby phoenix » Tue Jan 22, 2013 5:16 am

[quote user="arto"]I don't know what is the problem. Any idea?[/QUOTE]You could search the forums (or the internet) and find tons of information about the returned error. Do you know what a reverse DNS record is and why it's important? You apparently don't have the correct one for your server and some mail servers will reject mail under those circumstances. I'd suggest you try some of the internet sites to verify your reverse DNS record then get it corrected.
Regards

Bill

Rspamd: A high performance spamassassin replacement

Per ardua ad astra
arto
Posts: 28
Joined: Sat Sep 13, 2014 12:05 am

501 Domain must resolve (in reply to MAIL FROM command)

Postby arto » Tue Jan 29, 2013 3:18 am

Thanks phoenix. But i have correctly the reverse resolution for my MX. I think so...
help
kruon
Advanced member
Advanced member
Posts: 83
Joined: Sat Sep 13, 2014 12:36 am

501 Domain must resolve (in reply to MAIL FROM command)

Postby kruon » Wed Jan 30, 2013 2:25 am

[quote user="arto"]Thanks phoenix. But i have correctly the reverse resolution for my MX. I think so...
help[/QUOTE]
If I'm reading that right, someone is using user.name@example.local as sender, and for good reason, your server doesn't like it.

The sender needs to have valid address and server is rejecting it because the example.local cannot be resolved to anything sane.

Return to “Administrators”

Who is online

Users browsing this forum: Bing [Bot], Google [Bot] and 13 guests