On Wed, 6 Nov 2002, Tom Carroll wrote: > What I am wondering/wishing is if code can be added to the SMTP server > software to make it compare the actual valid DNS upon reverse lookup to > the domain being claimed by the connection. If the claimed domain is not > found anywhere within the string returned on the reverse lookup, the > connection would be closed with a 550 error to the SMTP server and > stopping the spammer at the front door and saving bandwidth.
That'll keep out some spam, and will also keep out quite a lot of legitimate email. And if everybody did that, you'd soon find that a lot of sites won't accept email from your server/site (depending on the clue and generosity of your ISP) - especially so if you operate multiple virtual domains. Good ideas for folk to work on, but don't fall into the trap of thinking the issues are simple. -- Charlie Brady [EMAIL PROTECTED] Lead Product Developer Network Server Solutions Group Mitel Networks Corporation http://www.mitel.com/smallbusiness Phone: +1 (613) 592 5660 or 592 2122 Fax: +1 (613) 592 1175 -- Please report bugs to [EMAIL PROTECTED] Please mail [EMAIL PROTECTED] (only) to discuss security issues Support for registered customers and partners to [EMAIL PROTECTED] To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Searchable archive at http://www.mail-archive.com/devinfo%40lists.e-smith.org
