Re: [Security-Discuss] Problems of SPAM with Postfix

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| First of all, take your mailserver offline. If you haven't
| configured it correctly you WILL end up in a blacklist very soon.

Yes, it's already online since I found the Spam

|
| If all the senders are on the same subnet as the mailserver you
| want this:-
|
| mynetworks_style = subnet
|
| Otherwise you want this:-
|
| mynetworks = 168.100.189.0/28, 127.0.0.0/8
|
| Where you define the IP ranges that are allowed to relay through
| your mailserver.

The problem is here: on the server I'v 5 Web-Sites, and I'd like each
admin can create about ten mailboxes; it's hard for me to allow 50
different subnet....
What servers like email or hotmail (and so on...) do? I can send email
through webserver on wich I'm not registered, are these open relay?
Thankyou,

Tommaso
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