So if mail is coming from a qmail server, is there no control in place to limit the amount of incoming mail? E.G. A qmail server is used to mail 20 000 to a specific domain on one of our servers and it sends all at once, there's nothing to stop those mails coming in and slowing everything down?
This isn't a huge problem for us, but I could see a dos type of attack going on? What's to stop some muppet out there deciding he doesn't like domain x, so he scripts a mail server to constantly sent small emails to xdomain which happens to be on our server. Since our server deals with email for that domain, it is allowed in. The only thing I can think of is to catch the sending ip via the logs and blacklist it? Is there anything else that can be done? thanks for the info. -----Original Message----- From: Eric "Shubes" [mailto:[EMAIL PROTECTED] Sent: 22 September 2006 14:18 To: [email protected] Subject: Re: [qmailtoaster] Mail flood question Jake Vickers wrote: > Craig Smith wrote: >> Great thanks George. Those settings had been in originally, but I had >> commented them out during testing and forgot to remove. Doh. >> >> So am I correct in assuming, it limits genuine incoming mails to 50 max >> during a specific time period from sender x, and the limits the amount of >> incorrectly addressed/non genuine mail incoming to 10? >> >> >> > That is correct. > "specific time period" being a single smtp session. These parameters will never kick in for mail coming from a qmail server, because qmail sends each message individually (using more bandwith than necessary). However, some mail servers group all recipients at the same host (receiving server) together in the same session, so the message only gets sent once to each receiving host (domain, essentially). These settings control that type of situation. -- -Eric 'shubes' --------------------------------------------------------------------- QmailToaster hosted by: VR Hosted <http://www.vr.org> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- QmailToaster hosted by: VR Hosted <http://www.vr.org> --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
