smtp debug

[David]

I have a user that has problems periodically sending
email. After hitting Send/Receive, it sits there and then
stops. The email remains in the Outbox. Here is a snippet
from the debug log: (I have changed names)

#####EXAMPLE 1
Microsoft Internet Messaging API 6.00.2800.1441
SMTP Log started at 09/16/2004 09:03:03
SMTP: 09:03:03 [db] Connecting to 'smtpserver.domain.com'
on port 25.
SMTP: 09:03:03 [db] srv_name = "smtpserver.domain.com"
srv_addr = 123.45.67.900
SMTP: 09:03:04 [rx] 220 smtpserver.domain.com ESMTP
Server (Microsoft Exchange Internet Mail Service
5.5.2657.72) ready
SMTP: 09:03:04 [tx] HELO sendershost
SMTP: 09:03:04 [rx] 250 OK
SMTP: 09:03:06 [tx] MAIL FROM: <[email protected]>
SMTP: 09:03:07 [rx] 250 OK - mail from
<[email protected]>
SMTP: 09:03:07 [tx] RCPT TO: <[email protected]>
SMTP: 09:03:07 [rx] 250 OK - Recipient
<[email protected]>
SMTP: 09:03:07 [tx] DATA
SMTP: 09:03:08 [rx] 354 Send data. End with CRLF.CRLF
#####END EXAMPLE 1

####EXAMPLE 2
Microsoft Internet Messaging API 6.00.2800.1441
SMTP Log started at 09/16/2004 09:06:36
SMTP: 09:06:36 [db] Connecting to 'smtpserver.domain.com'
on port 25.
SMTP: 09:06:36 [db] srv_name = "smtpserver.domain.com"
srv_addr = 123.45.67.900
SMTP: 09:06:37 [rx] 220 smtpserver.domain.com ESMTP
Server (Microsoft Exchange Internet Mail Service
5.5.2657.72) ready
SMTP: 09:06:37 [tx] HELO sendershost
SMTP: 09:06:37 [rx] 250 OK
SMTP: 09:06:39 [tx] MAIL FROM: <[email protected]>
SMTP: 09:06:39 [rx] 250 OK - mail from
<[email protected]>
SMTP: 09:06:39 [tx] RCPT TO: <[email protected]>
SMTP: 09:06:42 [rx] 250 OK - Recipient
<[email protected]>
SMTP: 09:06:42 [tx] DATA
SMTP: 09:06:42 [rx] 354 Send data. End with CRLF.CRLF
SMTP: 09:08:01 [tx]
..
SMTP: 09:08:02 [rx] 250 OK
SMTP: 09:08:02 [tx] QUIT
SMTP: 09:08:03 [rx] 221 closing connection
SMTP: 09:08:03 [db] Connection to '' closed.
####END EXAMPLE 2

In example 1, after the sender receives "354 Send data"
it sits there. In example 2, the message is sent and you
see a "[tx]" as well as the "." (with a ok and quit)

The only thing I can think of is an intermittent comm
problem with the smtp server, but noone else has that
problem.....

Any Ideas?

Thx!