SMTP Finder allows you to find the SMTP Server for any e-mail address with just the click of a button, and best of all, it is 100% free and exceedingly small.
Visual Basic 6 Runtime files
Intel Pentium I 120Mhz
Visual Basic 6 SP5 Runtime files
Microsoft XML 6.0 (now only used as a failsafe as of 2.1.0)