Outlook 2003 sending problems

[Danny]

We've got 2 computers using Outlook 2003, both are Windows XP.
We store our email folders on an external drive so that both computers can
access files.
This has worked fine for years.

A few days we began having problems sending emails.
This only happens on a handful of Email addresses.

This is the response we get from the system administrator;

Your message did not reach some or all of the intended recipients.

Subject: xxx
Sent: xxx

The following recipient(s) could not be reached:

xxxxxxxxxxxxxxxxxxx on 4/17/2009 3:13 PM
550 5.7.1 n3HKDCUi009319 This message does not comply with
required standards.

It seems like it is progressively getting worse.

This is driving me crazy. Can someone please help?

 

[Brian Tillman [MVP - Outlook]]

We've got 2 computers using Outlook 2003, both are Windows XP.
We store our email folders on an external drive so that both computers can
access files.
This has worked fine for years.

You've been lucky. Outlook's PSTs should not be hosted on a network share.
It's not supported and can lead to data loss.

A few days we began having problems sending emails.
This only happens on a handful of Email addresses.

This is the response we get from the system administrator;

Your message did not reach some or all of the intended recipients.

Subject: xxx
Sent: xxx

The following recipient(s) could not be reached:

xxxxxxxxxxxxxxxxxxx on 4/17/2009 3:13 PM
550 5.7.1 n3HKDCUi009319 This message does not comply with
required standards.

This is a server-side error which is usually "relaying deniied", which means
you're not properly authenticating to the outgoing server.