Since yesterday, I can't send mail from Versamail on my 650; everything just sits in "Drafts" or the Outbox. The screen displays: "Connecting to SMTP Server" for a long time, but the messages don't get sent. My settings haven't changed:

SMTP Server: myemail.t-mobile.com
Outgoing Server Port Number: 25
Use authentication (ESMTP) is checked
Username: [my T-Mobile phone number followed by :1]
Password: [my T-Mobile password ]

Any advice?