email issue with new Retina Ipad Mini

I can receive email but can not send. I have 2 Ipads. Both have the same mail settings. The new Retina Ipad wont send email. I keep getting the message

CANNOT SEND MAIL. THE USER NAME OR PASSWORD FOR SMTP:******@q.com@smtp.q.com is incorrect. I have checked and they are the same and

correct. I have removed and rebuilt the email account but still doesn't work.

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