MMS e-mails FAILING

All of a sudden a few weeks ago when I tried to send an MMS e-mail (9045551212@mailmymobile.net) to my phone I received a “Permanent Failure” response.  My first assumption was either that the phone company or Comcast had an issue but if I use Thunderbird it goes through fine.  Thoughts?  Thanks!

Changing your port as I mentioned in your other post may correct this also.

U da Double G-Man!!!  I have always used 587 but the “Force” seemed to get it through.  Thanks!

Cooper