[CentOS] How to handel smtp to public servers - done

[m.roth at 5-cent.us]

Götz Reinicke wrote:
> Am 27.06.12 16:08, schrieb Tilman Schmidt:
>> Am 27.06.2012 11:15, schrieb Götz Reinicke:
>>> Am 27.06.12 10:29, schrieb Fajar Priyanto:
>>
>>>> 1. Many malware have their own smtp and can send spam directly.
>>>> To overcome this, block port tcp 25 on your gateway, and only allow
>>>> your mailserver.
>>
>>> Hi, thanks for your suggestion. But for the mentioned clients thats not
>>> possible. :/ [...]
<snip>
> you dont know the resistant to advice of our users .... ;)
<snip>
> Long story short: I advised the use of port 587 two hours ago.
>
> FYI since than I had 169 outgoing connections to port 25 and 1 to 587. :)
>
> 	cheers . Götz fighting spam and resistant to advice

Hey, give 'em a chance. See what it's like after 24 hours. I suppose then
you could tell them it's a lottery, and you'll select random users to kick
off port 25....

        mark