http://www.senderbase.org/ can give you reports for all your IP networks
Just do it my way, block port 25 switch level.
Maybe block all mail ports on the servers, and allow them to relay via a secure setup mail server that is controlled by a few firewall rules with some software such as ASSP Deluxe for example, that would detect and filter spam correctly, that way you have a full control over the mail issues.
What about limiting the amount of emails being sent out from VPS (for example limiting outgoing connections to port 25 per hour - for example to 100/h). Normal small email systems should not reach this limit, and for spammers it should be the show-stopper due to low performance.
What Do You think guys ?
regs.
What Do You think guys ?
regs.
Last edited by a moderator:
be it spam emails, a client trying to do denial of service attack, or running a miner, silent throttling is the key. there are scripts out there that limit the number of emails going out from a vps, when it hits over limit , it silently discards them. And then the fun part begins when abusing client raises a ticket about why their email is not going out.