In our case, it helps that mail comes in to a Sendmail server which relays to our Exchange box. I was able to open up the IMS to accept from just certain IP addresses and from authenticated users.
Darcy -----Original Message----- From: Hansen, Eric [mailto:[EMAIL PROTECTED]] Sent: Thursday, October 18, 2001 8:32 AM To: Exchange Discussions Subject: RE: POP3 issue after disabling relay We did that, and had problems. Our final resolution was to have a invisible SMTP server. > Ali - you HAVE to allow relaying for POP3 to external addresses to work, because >your POP users have to use your IMS as a RELAY server for outbound mail. The trick >is closing the holes so that spammers can't use your server. > > On the routing restrictions page: turn on "Hosts and Clients that Successfully >Authenticate" then tell your POP users to set their client to pass their >authentication to their outbound server. In OE that's on the Servers tab and is a >checkbox that says "My server requires authentication" > > -----Original Message----- > From: Sethi, Ali [mailto:[EMAIL PROTECTED]] > Sent: Thursday, October 18, 2001 7:50 AM > To: Exchange Discussions > Subject: POP3 issue after disabling relay > > > Hello Everyone, > > Specs: > Windows 2000 server sp1 > Exchange 5.5 sp4 > > At one time our Exchange server was setup as a relay agent. We had numerous > ISPs like mindspring and earthlink block emails stemming from our domain. > Several days ago we corrected that problem by ensuring our Exchange server > is no longer setup to relay. The following steps were done to prohibit > relaying: > > 1.In IMS we unchecked 'Hosts and clients with these IP addresses' > 2.We also unchecked 'Hosts and clients connecting to these internal address > and remove the ip address and mask of our Exchange server. > > We are having issues with our POP3 users after making these changes to > disable relaying. We are getting complaints from users setup as POP3 that > they cannot send to external email addresses. They can only send to our > internal users. As a temp solution we have asked that our POP3 users use > OWA to send to outside clients. At present there are approximately 13 POP3 > users in our company so its not a major issues but just a slight > inconvenience for them. Is there a way we can correct this issue and allow > the POP3 users to send externally? Does any one have any suggestions? Any > assistance would be greatly appreciated. > > Thanks, > > > _________________________________________________________________ > List posting FAQ: http://www.swinc.com/resource/exch_faq.htm > Archives: http://www.swynk.com/sitesearch/search.asp > To unsubscribe: mailto:[EMAIL PROTECTED] > Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED] _________________________________________________________________ List posting FAQ: http://www.swinc.com/resource/exch_faq.htm Archives: http://www.swynk.com/sitesearch/search.asp To unsubscribe: mailto:[EMAIL PROTECTED] Exchange List admin: [EMAIL PROTECTED]
