I have this strange problem. We have an Exchange 2003 (with service pack 1) at our head office that is published by an ISA 2004 (with service pack 2). Our remote clients connect using Microsoft VPN, their OS being Windows XP.
Only one laptop have this problem. When he opens Outlook 2003 after connecting through VPN he can ricieve mails but when he tries to send (say 3 mails) it shows 1 of 3 mail sending and stays there. There is no change in the progress bar. I kept it like that for one hour to see if the mail ultimately goes but no luck. Strangely when he brings the laptop back to the head office and hooks up to the local LAN he can send mails within seconds.
What might be problem with only one laptop while others are working fine.