Occasionally, you might find that a Wi-Fi access point firewall won't allow you to contact your mail server. Try using your email provider's webmail interface in Safari, but keep the transmission secure with SSL. Two indicators that SSL is working in Safari are that the website’s URL begins with "https://" instead of "http://" and a lock icon appears to the right of the URL. Not every webmail provider offers secure webmail. Of the main iPhone options—MobileMe, Gmail, Yahoo, and AOL—only Gmail offers a secure web connection at https://mai|.google.com/mail/. (However, if you use Exchange or a different ISP, contact your administrator to see whether a secure webmail solution exists for you.) Some websites, such as www.mail2web.com allow you to check another provider's email with an SSL-encrypted connection. This can be secure as long as the website offering the service is also secure itself. Mail2web connects to all of the services we tried besides Yahoo, which doesn't allow you to check your email with other programs unless you pay for to its Yahoo Mail Plus service ($19.99 a year, mailplus.mail.yahoo.com).
