(Ubuntu Server 16.04) Slow sending smtp with attachment

By zdv070

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Hi! I have postfix + dovecot

How to speed up the upload attachment file from smtp?
Inbox mail very fast and send mail without attachment very fast. Send with attachment very slow 🙁

Upload 20Mb = up 1 minute…

Source:: http://askubuntu.com/questions/870570/ubuntu-server-16-04-slow-sending-smtp-with-attachment

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