'undeliverable: system administrator'

[greg]

Sorry but this is driving my crazy. Some emails i send
through a pop account do get sent. Some outgoing emails
do not appear to have a sending attempt, and are returned
to the inbox titled undeliverable by system
administrator. I sought online help and found that: the
program could not contact the pop account and therefore
was undeliverable. This is the only help answer i could
find. This is not the case for me. I can send multiple
emails at once and specific ones consistantly are listed
as undeliverable while others are consistantly sent. The
emails that are undeliverable can be sent if i use the
hosted email service that outlook connects to.

PLLEaseee hellp.

Thanks

 

[Brian Tillman]

Some outgoing emails
do not appear to have a sending attempt, and are returned
to the inbox titled undeliverable by system
administrator.

Please post the entire contents of one of these rejection messages (changing
sensitive IP and domain data, of course).