550 Sending error on just one domain name.

trec-r

Active Member
Aug 10, 2008
44
2
58
cPanel Access Level
Root Administrator
Recently moved all accounts to a new server. Was on a VPS now on a dedicated. All accounts are working fine, expect for one domain name. All email accounts on one domain get an error message in webmail.

In Roundcube the message is:
Code:
SMTP Error (550): Failed to add recipient "[email protected]" (Verification failed for <[email protected]>
The mail server could not deliver mail to [email protected] The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
Sender verify failed).
In Horde:
Code:
There was an error sending your message:
Message could not be delivered - the address was not found, is unknown, or is not receiving messages.
In Squirrelmail:
Code:
Message not sent.
Requested action not taken: mailbox unavailable
Server replied: 550 Verification failed for <[email protected]>
The mail server could not deliver mail to [email protected] The account or domain may not exist, they may be blacklisted, or missing the proper dns entries.
Sender verify failed
I have checked DNS settings, repaired perms, and checked all the settings I could think of with no change.
 

trec-r

Active Member
Aug 10, 2008
44
2
58
cPanel Access Level
Root Administrator
This has been solved, kinda. I did not know it but one of my coworkers was working on the issue at the same time. He said the MX was set to remote and changed it to local. I followed the steps from this post Unable to send mail from within Webmail which also appeared to be a problem. However because we both made changes, I am unsure what actually fixed the problem.
 

cPanelMichael

Administrator
Staff member
Apr 11, 2011
47,909
2,227
463
Hello :)

I am happy to see the issue is now resolved. Thank you for updating us with the outcome.
 

aztopdavid

Well-Known Member
Jan 1, 2016
53
9
58
Arizona
cPanel Access Level
Root Administrator
I always hate it when I come across a thread that matches my needs, reading through pages and pages of posts, just to find someone post "Solved it thanks guys!" with nothing about how it was solved. I don't want to be that guy.
I followed the link above and the clue that helped me was this response:
It turns out that the From address that you set in Horde was causing the problem.
Log into Horde, click on Options at the top, Personal Information
I had just recently messed with my "Personal Information" settings in Horde, adding an identity and I had a typo in my email address, which was producing the somewhat misleading error message.