Laptop users are increasingly having an issues due to ISPs disallowing SMTP servers besides the one they provide for security purposes. So laptop users end up needing to reconfigure their email settings every they switch networks. What a pain!
Here are some potential software solutions:
1) Use local (laptop based) SMTP software:
Free SMTP Server is a SMTP server program for Windows that lets you send email messages directly from your computer. If this works this will be the quickest fix to the laptop issue. http://www.softstack.com/freesmtp.html
Here is a commercial tool ($49) as alternative: http://www.getfreefile.com/localsrv.html
2) Use software to switch SMTP servers based on your current location:
Autoroute SMTP (ARS) is designed for automatic switching between SMTP servers depending on what network you are currently working in. http://www.mailutilities.com/ars/
Also, here is a list of other SMTP utilities with other software solutions to this problem: http://www.dirfile.com/freeware/smtp.htm