Outbox and attachments

Quite suddenly my eMClient wont send attachments. The messages go into the Outbox, but wont then transmit out. I’ve tried the “Repair” option, but it ceases prematurely with a message that an error has occurred and no repair effected. Can anyone advise?

It really depends on why it wasn’t sent.
It could be a size restriction, or something else.

Go to Menu > Operations then click on the Log tab.
Look for any SMTP errors.
You can select the error, and copy and paste it here.