Absolutely sure. It happened several times during a series of hardware problems with one of our mail servers. I was proxying two mail domains but not a third (a personal domain I host work). Mine was always OK, the others bounced whenever the RoBoX didn't see the servers. This was up to at least 3.6.x.- but this is on an elderly RoBoX-R unit that has some other quirks.
I do a/v and a/s on the mail servers and have our ISP perform inbound and outbound a/v and a/s (as well as store & forward))on the pipe. Jack -----Original Message----- From: blist To: [email protected] Sent: 4/14/06 4:47 PM Subject: Re: [gb-users] License question Are you sure about this? My tests show a 4xx error being issued which should generally cause the sending mail server to queue the message. I did test through a relay server though (the relay server queued the message just fine when the firewall couldn't reach the backend mail server). Overall the AS/AV works quite well in our experience. Jack Daniel wrote: > One issue to be aware of with Mail Sentinel (not directly related to > anti-spam and a/v, but significant) is the behavior of the mail proxy when > the mail server is down. The mail proxy bounces mail with a "not a mail > server" type message instead of a "not responding" message. As a result, if > you have a store-and-forward solution in place the recovery server probably > will not queue mail, it will just bounce everything as undeliverable. > > > > Jack Daniel, CISSP > Systems Administrator > South Shore Imported Cars www.sscars.com > Mass Buying Power www.massbuy.com ------------------------------------------------------ To unsubscribe: [EMAIL PROTECTED] For additional commands: [EMAIL PROTECTED] Archive: http://archives.gnatbox.com/gb-users/ ------------------------------------------------------ To unsubscribe: [EMAIL PROTECTED] For additional commands: [EMAIL PROTECTED] Archive: http://archives.gnatbox.com/gb-users/
