Verizon FiOS & DSL customers must change outgoing SMTP port to 587
Verizon is slowly rolling out a security policy update on their networks which will prevent their customers from sending mail to non-Verizon servers on port 25 (the standard SMTP port). If you've recently started receiving errors when sending email with your iTistic hosted email account and you are a Verizon customer this is most likely your problem. Please visit verizon.net/port25 for instructions on how to update your settings so you can continue sending emails without any problems. If you continue to experience problems after following Verizon's instructions please submit a support ticket and we'll be happy to help.