WebJul 15, 2015 · Created on July 14, 2015 Server error: '550 5.1.1 ...user unknown" I'm unable to respond to some email - When I hit reply, I'm getting an immediate notification that I can't send the email and the message is the message "550 5.1.1... (email address)...user unknown" How do I correct this? This thread is locked. WebHow To Check If User Has Been Marked As Invalid Navigate to Users and Groups > SMTP Discovery. Select Marked Invalid List from the dropdown. Type name of the user in question in the search text field. If you find the user email that stopped receiving emails, you need to delete that user. How To Delete User Has Been Marked As Invalid
550 5.1.1 : Recipient address rejected: User unknown
WebNov 20, 2008 · User unknown <<< 554 5.5.1 Error: no valid recipients Click to expand... The thing I find strangest about this, is that [email protected] (the proper users email address on the ispconfig server) seems to be getting converted to [email protected] name. ie. the domain name part of the email address is being converted to the hostname of the ... WebHow to fix the error ‘550 5.1.1 User unknown’ in Qmail and Postfix for Plesk servers. First of all, verify that the recipient domain is properly resolving to the correct server and it has its … fec individual donor search
Remote Server returned
WebApr 6, 2024 · We may also refer to this related issue: Remote Server returned '< #5.1.1 smtp; 550 5.1.1 ... User unknown>' when send mail from external address. Well, if there is a spam gateway on the perimeter then it's probably this gateway that generates the 5.1.1 . Those gateways usually do an AD lookup which may be on some kind of schedule. WebHow to Safelist. If you have email protection software with Proofpoint, search for emails from [email protected] and find the email address … WebNov 3, 2024 · The following recipient(s) could not be reached:[SMTP:[email protected]]: Remote SMTP Server Returned: 550 5.1.1 : Recipient address rejected: User unknown in local recipient table This bounce shows that mail server rejected the mail as it could not find the email address [email protected] within the server. deck the halls movie 2011 - cast