Yes, DNS resolution continues to work correctly. I'm using the IIS SMTP as a relay and having my exchange server forwarding all messages to the IIS box's SMTP, I think that's what you're advocating. This also makes it a little difficult to troubleshoot the mail problems since the SMTP doesn't give in-progress errors (that I know of) like Exchange's IMS. I can't leave this system set up in a non-working state for 24 hours to get non-delivery reports.
Mike -----Original Message----- From: Purviance, Chad [mailto:[EMAIL PROTECTED]] Sent: Monday, November 12, 2001 10:34 AM To: MS-Exchange Admin Issues Subject: RE: Packet filtering stops SMTP This may be obvious but Don also asked "Can you resolve DNS names?" I would look at the Queue (on the IMS Connector itself) and see what reason it is listing for non-delivery. If the message is "Host un-known" validate you can ping by name and connect via port 25. If the message is "network issues" or the like then review your outbound and inbound Filters. Also, it is not being updated but http://proxyfaq.networkgods.com/ provides some excellent information on Proxy2.0. I personally use the IIS SMTP as a relay and leave Exchange pure with a Forward to the IIS box approach. Chad Purviance, CMSE+I, MCT -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]] Sent: Monday, November 12, 2001 1:22 PM To: [EMAIL PROTECTED] Subject: RE: Packet filtering stops SMTP Sorry for replying directly instead of to the list, Don. You've hit on the point that I don't understand. When I enable the packet filtering, I can telnet on port 25 from my Proxy/SMTP relay machine to my home-account's ISP and manually create an email using the SMTP commands. But if I send an email from Outlook, it goes from exchange, to my Proxy/SMTP box, but never gets delivered to my ISP, it just sits in the SMTP Queue directory. I'm pretty sure I also connected via telnet from my home and created an email, but no external email will comes in if I have the packet filtering on. That's when I tried searching the knowledge base. I came up with articles Q176947 and Q252877, both of which seemed promising but did not work. I'm at a loss as to what is going on. Mike -----Original Message----- From: Don Ely [mailto:[EMAIL PROTECTED]] Sent: Friday, November 09, 2001 4:56 PM To: 'Mike Powell' Subject: RE: Packet filtering stops SMTP Can you telnet to port 25 from the outside? Can you telnet from your mail server to port 25 on another mail server outside of your proxy? Can you resolve DNS names? -----Original Message----- From: Mike Powell [mailto:[EMAIL PROTECTED]] Sent: Friday, November 09, 2001 11:28 AM To: 'Don Ely ' Subject: RE: Packet filtering stops SMTP Sorry, Don, but maybe you should read the manual. When you run packet filtering software (or hardware), it stops everything except what you specifically allow. That means if I add a filter for port 25 (SMTP), it will then allow traffic to pass on port 25. So far on my box, I've allowed traffic on port 25, 80, and whatever ports Ident and DNS use, but SMTP traffic both in and out still get stopped. Anyone else got any ideas? Mike -----Original Message----- From: Don Ely To: MS-Exchange Admin Issues Sent: 11/9/2001 10:25 AM Subject: RE: Packet filtering stops SMTP Uhhh... Proxy is a packet filtering software. A poor one, but that's what it is. As far as your mail problem, sounds like your filtering everything and not allowing any connections to port 25 for SMTP. -----Original Message----- From: Mike Powell [mailto:[EMAIL PROTECTED]] Sent: Thursday, November 08, 2001 3:30 PM To: MS-Exchange Admin Issues Subject: Packet filtering stops SMTP Does anyone out there use the Packet Filtering that's built into Proxy Server 2.0? I'm trying to get packet filtering set up, because security is like, a good thing, but every time I turn on filtering, all incoming and outgoing SMTP mail stops. I have added the DNS, SMTP, and Ident filters (as per Q176947), but still get no SMTP, so I still can't turn the packet filtering on. Anyone deal with this or have any ideas? Mike List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm +++The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this document.+++ The information transmitted is intended only for the person or entity to which it is addressed and may contain confidential and/or privileged material. Any review, retransmission, dissemination or other use of, or taking of any action in reliance upon, this information by persons or entities other than the intended recipient is prohibited. If you received this in error, please contact the sender and destroy any copies of this document. List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm List Charter and FAQ at: http://www.sunbelt-software.com/exchange_list_charter.htm
