is not defined

not known at this site

Unknown recipient

Please remove

User address not known

loop detection

Original-Recipient:

(bounced)

is not found in the

Re: Message to

Recipient address:

Delivered-To:

RCPT To:

The user return_address

The following message could not be delivered

User unknown

unknown user

is unknown

Your message has encountered delivery problems to

Error-For:

expanded from:

not listed in public Name & Address Book

Originally addressed to

Cannot speak with

Your message was not delivered to

No storage space available in mailbox for

User mailbox exceeds allowed size

Failed to deliver your message to

Deferred: Connection refused by

Deferred: Operation timed out with

Deferred: No route to host

The following message could not be sent