Why does some mail send + some gets stuck in outbox?

K

Kate

Most of my e-mail is listed in the Outbox under "Today" until is is sent. I
am set to send/receive every 2 minutes. Some e-mails get listed under date
"None" and never send. I can re-open and a message near the top indicates
"this message not sent." I can hit send again, but it still gets stuck under
date "None." Mail to the same address could end up in either location.
Please let me know what I need to do to correct this! Thanks.
 
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