Email delivery failure

Email delivery can fail for multiple reasons:

• Some errors might be transient.
• Some errors can be corrected by the user: setting a new email address, removing the address from the list.
• Other errors require an intervention of an administrator.

Delivery errors

Information only

Out of office

Message was delivered, but not (yet) read. You can mostly ignore the error, or contact a colleague.

Transcient

Mailbox full

• User does not archive e-mail
• User possibly absent/dead?
• If it continues, maybe remove the address from the list.

Fatal

Redirect error

Wrong redirect. if it continues, maybe remove the address from the list.

Domain unknown

host lenniksarchief.be

Host lenniksarchief.be not found: 3(NXDOMAIN)

• This domain does not exist any more (organisation dissolved)
• if it continues, maybe remove the address from the list.

User unknown

• Changed job?

• Correct the address or remove from the list.

User disabled

• Changed job?
• Correct the address or remove from the list.

Mail handling

Spam

• Message rejected, suspected spam.
• Target user should register the sender address as trusted