Hello people,
I have had a problem, with intermittent message send failure, and on hitting retry it would go. Finally figured out what was causing it today, but why it was happening I don't know.
I finally twigged failure to connect would only happen on emails where I had a signature attached. The signature had two small PDF images in it. I tested this a couple of times and was definetly the signature causing it!
I have created a new signature, with exactly the same format and images, voila!! no more failures.
Do not know why it was failing, it has worked with the same sig for the last 2 years!
Anyway, if you have a signature attached normally, and are having intermittent message send failure, try without sig and if this works create a new signature!
Good luck!!