outlook - large email sending several times
some of my clients were having trouble sending large attachements throush my postfix server.
It went like this: when the file attached was bigger than 1 MB, the receiver got the mail around 8 times.
First i thought it is the person who sent it, being tired of waiting [they were on a slow connection to the internet] it clicked the send button several times.
it wasn’t the case.
then i thought , maybe there is a microsoft thing that didn’t comply with the standards. No it wasn’t.
i disabled their anti-virus software, check my postfix configuration, analysed the logs. nothing.
then, i saw a setting in the outlook called "server timeout". Bingo. that did it.
it was set to 1 minute and a half, and i increased it to 8 minutes.
no duplicate sent emails any more.
another client satisfied. Next! :)