• RSS
  • Twitter
  • FaceBook

Exchange Server Forums

Forums | Register | Login | My Profile | Inbox | RSS RSS icon | My Subscription | My Forums | Address Book | Member List | Search | FAQ | Ticket List | Log Out

Trouble with Mail Relay

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [Microsoft Exchange 2013] >> Message Routing >> Trouble with Mail Relay Page: [1]
Login
Message << Older Topic   Newer Topic >>
Trouble with Mail Relay - 9.May2016 9:05:02 AM   
HimeshGohil

 

Posts: 5
Joined: 4.Apr.2016
Status: offline
Hi, I've just upgraded to exchange 2013 and relay is working fine apart from one server.
I've created a receive connector and tested relay from other servers quite happily, one particular one won't relay. When testing from Telnet, I get 5.7.1 unable to relay.

The server has been listed in the relay rule. It sits in the DMZ behind a firewall. Checking the firewall logs, I see the traffic being passed through with the correct IP's listed. As a precaution, I've added the firewalls IP to the relay connector in case exchange sees the firewall as the sender.
I've tried turning on verbose logging but my failed attempts do not get logged.

Any tips on what else I can do do discover where this is failing would help

Thanks,
Himesh
Post #: 1
RE: Trouble with Mail Relay - 10.May2016 4:27:13 AM   
HimeshGohil

 

Posts: 5
Joined: 4.Apr.2016
Status: offline
A little update, I've connected the server directly to the internal LAN to bypass the firewall and the mail relay works fine.
So it's only when running through the firewall. Inspecting the packets and it all looks fine. with the correct source, destination and sources.
Any other thoughts on how to check logs etc would be appreciated

< Message edited by HimeshGohil -- 10.May2016 6:10:31 AM >

(in reply to HimeshGohil)
Post #: 2
RE: Trouble with Mail Relay - 11.May2016 5:39:08 AM   
HimeshGohil

 

Posts: 5
Joined: 4.Apr.2016
Status: offline
I finally tracked this down to the firewall natting the connection so the Exch server thought he traffic was coming from the firewall and not the client

(in reply to HimeshGohil)
Post #: 3
RE: Trouble with Mail Relay - 22.May2016 11:56:27 AM   
Lekhan

 

Posts: 18
Joined: 4.Feb.2014
Status: offline
Possible you have NAT in your network, and source IP can be replaced by some NAT IP.
You need enable verbose logging for your receive connectors, and check via telnet "hello thisisatest"
Then find this string in transport logs. You will discover your real ip address.

(in reply to HimeshGohil)
Post #: 4

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [Microsoft Exchange 2013] >> Message Routing >> Trouble with Mail Relay Page: [1]
Jump to:

New Messages No New Messages
Hot Topic w/ New Messages Hot Topic w/o New Messages
Locked w/ New Messages Locked w/o New Messages
 Post New Thread
 Reply to Message
 Post New Poll
 Submit Vote
 Delete My Own Post
 Delete My Own Thread
 Rate Posts


Follow TechGenix on Twitter