On Friday 20 April 2012 20:56:58 mick wrote:
On Thu, 19 Apr 2012 12:32:13 +0100
Stuart Bailey stuart@linusoft.co.uk allegedly wrote:
Hello, Does anyone know if Postfix can detect outgoing SPAM, or more specifically bulk emails? I think a way to restrict or limit a hosted domain to sending only a few emails per hour would solve my problem.
Stuart
Do you use smtp authentication? Insisting on auth before relaying would probably cut down most bulk email attempts.
There is a good list of howtos and addons at http://www.postfix.org/addon.html
Mick
Thanks Mick, The situation is I have a customer who is hosting emails for a number of domains (his customers). He has been hit in the past when one of his customers got infected with malware that started sending spam out. This led to his IP being recorded in numerous blacklists, causing problems for his other customers.
So I will send outgoing emails via something like spamassassin, but not sure in SMTP AUTH will make much difference, since they are legitimate clients.
Some way of limiting outgoing emails per user - as suggested in anvil - may work well. i'll report back when I've tried it.
Thanks,
Stuart
Stuart Bailey BSc (hons) CEng CITP MBCS LinuSoft (Managing Director) Linux Specialist & Software Developer ~~~~~~~~~~~~~~~~~~~~~~~ Phone: (0845) 658 3563 Direct: +44 (0) 1953 878162 Fax: +44 (0) 1603 858583 ~~~~~~~~~~~~~~~~~~~~~~~ http://www.linusoft.co.uk
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