2 problems sending goes on/on and reply emails get errors

[alanainfl]

I have 2 things happening first when I open or send an email it just seems to
keep trying but does not seem to get out...I think most of these emails are
replys and below is the error I get from (I replaced name with ????? for
privacy)
sys admin- Your message did not reach some or all of the intended recipients.

Subject: RE: if you can call me Fri. Afteroon.
Sent: 7/24/2006 10:38 PM

The following recipient(s) could not be reached:

????????- 2574' on 7/24/2006 10:38 PM
553 sorry, that domain isn't allowed to be relayed thru this MTA
(#5.7.1)

 

[Milly Staples [MVP - Outlook]]

you are trying to send through a server other than the one to which you are
currently logged on. Set your authentication appropriately for that server.

--
Milly Staples [MVP - Outlook]

Post all replies to the group to keep the discussion intact. All
unsolicited mail sent to my personal account will be deleted without
reading.

After furious head scratching, alanainfl asked:

| I have 2 things happening first when I open or send an email it just
| seems to keep trying but does not seem to get out...I think most of
| these emails are replys and below is the error I get from (I replaced
| name with ????? for privacy)
| sys admin- Your message did not reach some or all of the intended
| recipients.
|
| Subject: RE: if you can call me Fri. Afteroon.
| Sent: 7/24/2006 10:38 PM
|
| The following recipient(s) could not be reached:
|
| ????????- 2574' on 7/24/2006 10:38 PM
| 553 sorry, that domain isn't allowed to be relayed thru
| this MTA (#5.7.1)