That strategy would be best. Spammers will often use the second MX record in preference, knowing why you're doing what you're doing. Really, you're safe for a two-day spam filter outage; most SMTP hosts will retry for that long.
I can't say whether you'll have problems with reverse lookup or not. Ed Crowley MCSE+Internet MVP Freelance E-Mail Philosopher Protecting the world from PSTs and Bricked Backups!T -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Woods, Tony Sent: Tuesday, October 21, 2003 3:09 PM To: Exchange Discussions Subject: RE: Forcing IMS Thanks for the reply, Ed. So I only have two available external IP's. One for Exchange, one for the SPAM filter. I have users in the field using the Exchange external IP DNS name for their incoming and outgoing server settings (mail.moneymart.ca). Without making a huge change to the clients in the field, I'm not sure I have many options. So maybe I'll just kill the second MX record until I can get a third IP... This way the users in the field can still send outgoing via the DNS entry they have. Will this effect reverse lookups? The Exchange box is set to send mail via DNS instead of through the SPAM box still. Thanks. -----Original Message----- From: Ed Crowley [MVP] [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 21, 2003 1:59 PM To: Exchange Discussions Subject: RE: Forcing IMS Don't point the failover to your Exchange server. Instead, point the failover MX to a Windows 2003 SMTP Service that relays messages to your spam box. If the spam box goes down, this box will accept the mail and queue it up until the spam box is on line. Or just depend on everyone to retry for two days, which is the norm. Ed Crowley MCSE+Internet MVP Freelance E-Mail Philosopher Protecting the world from PSTs and Bricked Backups!T -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Woods, Tony Sent: Tuesday, October 21, 2003 1:42 PM To: Exchange Discussions Subject: Forcing IMS Hello, Exchange 5.5 SP4 on W2K SP3 This might be dumb but is there a way to force the IMS on Exchange to only accept mail from a certain IP address? I have two MX records, one going to our SPAM box with Cost of 10 and the other to our Exchange box with cost of 100 as fail over. The Exchange box appears to still be accepting mail and the IMS queues are filling up with the SPAM crap...etc and I would like it to only accept mail from the SPAM filter box. BTW - the SPAM box is SAV for SMTP Gateways. Thanks in advance. Tony _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang =english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Web Interface: http://intm-dl.sparklist.com/cgi-bin/lyris.pl?enter=exchange&text_mode=&lang=english To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
