I just posted this tip to the Friends in Tech blog. You can check out the entire article at Friends in Tech.com.
As some of you may have experienced, sending mail from your email program might not work when you are using public WiFi networking hot spots, such as those in hotels or coffee shops. This is usually due to port restrictions on the network, put in place to prevent anonymous users from using the network to send SPAM or attack other network systems.
(Continues at Friends in Tech)