• 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

Sending Mail External Fails - Message in Queue

Users viewing this topic: none

Logged in as: Guest
  Printable Version
All Forums >> [Microsoft Exchange 2013] >> Message Routing >> Sending Mail External Fails - Message in Queue Page: [1]
Login
Message << Older Topic   Newer Topic >>
Sending Mail External Fails - Message in Queue - 29.Dec.2014 2:47:52 PM   
bheusmann

 

Posts: 7
Joined: 10.Jul.2005
From: USA
Status: offline
I have a new installation of Exchange 2013 in my network. I have a 3-node network, External, Perimiter (DMz), and Internal. This is confugured utilizing Microsoft Threat Management Gateway 2010. I have a split DNS infrastructure. My internal network has Active Directory and the DNS forwards requests to my Perimiter DNS server. My permiter DNS server forwards requests to Google PUblic DNS 8.8.8.8. This seemed to work a bit better than using my ISP DNS.

I can send email internally between users with no issues. I have created a Send connector as described in a MS article for all other domains. I'm seeing in my TMG firewall logs that the SMTP from the exchange server is not getting denied and it is resolving to gmail. This is the error in the NDR:

Remote Server at gmail.com (2a00:1450:4013:c01::1a) returned '400 4.4.7 Message delayed'
12/29/2014 1:16:01 AM - Remote Server at gmail.com (2a00:1450:4013:c01::1a) returned '441 4.4.1 Error encountered while communicating with primary target IP address: "Failed to connect. Winsock error code: 10051, Win32 error code: 10051." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts. The last endpoint attempted was 2a00:1450:4013:c01::1a:25'


Any suggestions would be appreciated. Thanks.

-B
Post #: 1
RE: Sending Mail External Fails - Message in Queue - 31.Dec.2014 4:25:44 AM   
prakashx86

 

Posts: 17
Joined: 23.Mar.2012
Status: offline
Hi bheusmann,

I can see there is ipv6 , is it possible to disable it.

Pls check this url for similar threads :

https://social.technet.microsoft.com/Forums/exchange/en-US/b067278e-391d-4622-87d3-a36881fa1b97/error-sending-emails-to-internet-failed-to-connect-winsock-error-code-10051?forum=exchangesvrsecuremessaging

http://www.experts-exchange.com/Software/Server_Software/Microsoft_Server_Applications/Q_28324305.html

Thanks
Prakash

(in reply to bheusmann)
Post #: 2
RE: Sending Mail External Fails - Message in Queue - 31.Dec.2014 10:01:36 AM   
bheusmann

 

Posts: 7
Joined: 10.Jul.2005
From: USA
Status: offline
Hi Prakash,

I found that my ISP blocks port 25 which is why it was failing. I have a mail reflector with my DNS registrar that is able to send mail on a different port than 25. I'm trying to configure my transport hub to work with this. Thanks for the reply.

-BH

(in reply to prakashx86)
Post #: 3

Page:   [1] << Older Topic    Newer Topic >>
All Forums >> [Microsoft Exchange 2013] >> Message Routing >> Sending Mail External Fails - Message in Queue 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