This would be the most likely cause if you have installed SP2. The builtin windows firewall is turned on by default under XP SP2. You can either exclude port 25 or turn the firewall off all together under Control Panel -> "Windows Firewall"


Thanks,
Greg W

In reply to Re^2: port 25 on windows XP by gawatkins
in thread port 25 on windows XP by Anonymous Monk

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