Can someone help me here please with some advise.

Question asked by keith dovale - 10/28/2014 at 4:13 AM

Unanswered

Basically, there are 2 mail servers, which are mxbackups for the other, each server has about 500 domains on it, mails inbound from external mail servers are deleivered just fine and anti spam is working 100%, however, mails from one domain to the domains on the other smartermail server are being picked up as spam, due to a dsl ipaddress being listed on rbls, the primary server authenticates the user and all is fine, the moment the mail is delivered to the second, server with the authenticated header, spam checks are run and the email is sent to spam because the ip address of the dsl is listed on 3 rbl lists as dynamic ??

How do we correct this ?

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Bruce Barnes Replied

10/28/2014 at 6:29 AM

Is the address actually a dynamic IP address? They are blocked by most ISPs now, and the only way to resolve the issue is to get a static IP address.

Bruce Barnes ChicagoNetTech Inc brucecnt@comcast.net Phonr: (773) 491-9019 Phone: (224) 444-0169 E-Mail and DNS Security Specialist Network Security Specialist Customer Service Portal: https://portal.chicagonettech.com Website: https://www.ChicagoNetTech.com Security Blog: http://networkbastion.blogspot.com/ Web and E-Mail Hosting, E-Mail Security and Consulting

keith dovale Replied

10/29/2014 at 7:18 AM

Hi Bruce, the servers are static addresses, its the clients ip address on adsl that is listed, and when received by the first mail server it is authenticated and bypasses spam checks, but when its delivered to the other domain on another SM server, the spam checks are run and the dsl address is seen as listed and this causes the mail to be seen as spam..

Bruce Barnes Replied

10/29/2014 at 7:50 AM

1. If you do not have SRS enabled, turn it on.

2.0Dynamic IP addresses are NOT ALLOWED on e-mail servers.

The sending domain, who is using the dynamic/DSL IP address must upgrade to a commercial account and request a STATIC IP ADDRESS. Only then can they setup a proper rDNS.

The use of dynamic IP addresses from DSL providers / residential / non-commercial accounts will almost always get someone blocked now.

See the document: Why Am I Having Problems Getting My E-Mail Delivered? for more information on the latest requirements which must be met to ensure e-mail is properly delivered and accepted.

keith dovale Replied

10/30/2014 at 3:17 AM

Hi,

Both servers are running SRS already.

I think you getting mixed up here the first machine is a clients pc running outlook, which sends via the mail server SM1. If this was the case every mail client would need a dedicated ip address, the only 2 devices that need static ips and they have them is the mail servers themselves. This issue happens if a mail is sent via cellphone, pc, etc, I cannot believe that this is the NORM, before SM12.4 we never had this issue. howecome all of a sudden,

SM suggests that we set the domain as a trusted sender on the 2 domains, This I feel is nonesence, this means effectively if any domain on the 1st server needs to send to a domain on the other servers, of which we have 6, they have to be setup as trusted senders to allow mails to be sent between them.

keith dovale Replied

11/4/2014 at 5:44 AM

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