Christos Chatzaras skrev den 2019-02-19 12:23:
Also we use Postfix relays with Rspamd checking the From header (we
don't allow users to spoof From address) and doing rate limits (500
e-mails / hour). If someones tries to send more e-mails then the extra
e-mails go to queue for later delivery. So we have some time to
manually check.

On 19.02.19 14:02, Benny Pedersen wrote:
you have users that can write 500 emails in one hour ?

yes, bigger companies that send newsletters or notifications to even their 
users.

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