The server is unable to connect or start an SMTP session.
Usually point to a configuration problem.
For example, incorrectly spelled the SMTP...
Timeout connection problem. The server Administrator of the receiving mail will have the option to confirm the real issue only.
Typically, as a...
Recipient mailbox has exceeded its storage limit.
It could be message delivery directory is running over sized
Mailbox has exceeded its stora...
Not enough space on the disk.
Number of recipients the email message has – receiving server cannot parse which of the recipients it is supposed...
Recipients exchange server incoming mail queue stopped.
Typically, due to a connection problem.
Step 1: Contact NET For More Informatio...
The recipient server is not responding. This issue is explicitly regarding the recipient incoming mail server.
Used up all your data transfer quo...
The maximum of hop count was exceeded for the message. This means that your server does not know where to send the mail.
An internal loop has oc...
Your outgoing message timeout due to an issue that concerning the incoming server.
Issues concerning the incoming server
Happens generally wh...
A routing error that is related to Microsoft Exchange Server only. It is also similar to Error 432.
A message is sent to a receiver who was a m...
User mailbox is unavailable.
A process on the remote server is tidying up the mailbox
The remote mailbox could be corrupted
Remote mailbox ...