Trouble sending email

[Kingdom Flight]

I have 3 different email accounts (including a .mac) and I can receive email through all of them but I cannot send email from any of them through my iPhone unless I am using my wireless wifi connection at home.

Any suggestions?

 

[TrippalHealicks]

I have 3 different email accounts (including a .mac) and I can receive email through all of them but I cannot send email from any of them through my iPhone unless I am using my wireless wifi connection at home.

Any suggestions?

Is there an error message presented when it doesn't send the emails?