No reconfiguring of your customers are needed. You need to upgrade Imail to 8.2 minimum because your need to get the version of Imail that has authentication port 587. Then you basically change Imails regular smtp port to listen on port 12345 (or similar). Then you have your gateway send to Imail on port 12345 since the gateway can't authenticate and then you change the authentication port from 587 to 25.
Viola', now all mail sent directly to Imail on port 25 has to authenticate but your gateway can send to Imail without authentication on port 12345. This will of course mean that all your users will have to authenticate but I assume that they already do that. If not, you have to have them enable "My outgoing server requires authentication" in their email programs. Jonas Fornander - System Administrator Netwood Communications,LLC - www.netwood.net "Find Out Why We're Better" - 310-442-1530 -------------------------------------------------------------------- Now offering Fiber Optic Internet service throughout the Continental USA. Speeds start at 5Mbps/2Mbps Go to www.netwood.net to fill in a qualification request > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of James Nelson > Sent: Thursday, March 23, 2006 3:04 PM > To: [email protected] > Subject: Re: [IMail Forum] Restrict inbound SMTP > > If I wanted to swap the SMTP ports, that would require > reconfiguration > on all the clients, correct? But since I'm running 8.13 > right now (use > a custom ODBC connector that I don't have time to re-write > bring up past > 8.14 (and I'm re-engineering it so the custom ODBC isn't > needed in the > near future). > > And if by Len's firewall you mean IMGate (http://imgate.meiway.com/) > that wouldn't stop outside sources from manually bypassing > our gateway, > would it? > > ::James Nelson > > Jonas Fornander wrote: > > >To reject mail that is bypassing your gateway, you either > have to do my fix > >of swapping port 25 and port 587 (requires Imail 8.20) or > use Len's firewall > >solution. > > > >Jonas Fornander - System Administrator > >Netwood Communications,LLC - www.netwood.net > >"Find Out Why We're Better" - 310-442-1530 > >-------------------------------------------------------------------- > >Now offering Fiber Optic Internet service throughout > >the Continental USA. Speeds start at 5Mbps/2Mbps > >Go to www.netwood.net to fill in a qualification request > > > > > > > > > > > >>-----Original Message----- > >>From: [EMAIL PROTECTED] > >>[mailto:[EMAIL PROTECTED] On Behalf Of > James Nelson > >>Sent: Thursday, March 23, 2006 2:25 PM > >>To: [email protected] > >>Subject: [IMail Forum] Restrict inbound SMTP > >> > >>I am inserting an email gateway inbetween the internet and > our Imail > >>server, and was wondering if I can restrict inbound SMTP > >>traffic to only > >>come from a specified IP or Authed users. Basically, the only SMTP > >>connections to this server should include: > >>1. messages from our gateway to local users > >>2. messages that local users send (either to other local users or > >>outside our network) > >> > >>The other possibility that I want to prevent is: > >>3. messages from outside our network that sends email > directly to our > >>Imail server bypassing our gateway (where the MX records > indicate it > >>should go). > >> > >>There appears to be some messages that are doing number 3 > based on my > >>testing and everything that does is not playing by the rules and > >>therefore not desirable :) I've considered having our > router to the > >>internet reroute all SMTP traffic to our gateway, but this is > >>a bit of > >>work that may be tough to implement. > >> > >>Any ideas? Thanks, > >>::James Nelson > >>To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > >>List Archive: > >>http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > >>Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > >> > >>-- > >>No virus found in this incoming message. > >>Checked by AVG Free Edition. > >>Version: 7.1.385 / Virus Database: 268.2.6/288 - Release > >>Date: 3/22/2006 > >> > >> > >> > >> > > > > > > > > To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html > List Archive: > http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ > Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/ > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.385 / Virus Database: 268.2.6/288 - Release > Date: 3/22/2006 > > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.385 / Virus Database: 268.2.6/288 - Release Date: 3/22/2006 To Unsubscribe: http://www.ipswitch.com/support/mailing-lists.html List Archive: http://www.mail-archive.com/imail_forum%40list.ipswitch.com/ Knowledge Base/FAQ: http://www.ipswitch.com/support/IMail/
