Exchange 2010 Receives But Does Not Send Email To Internet

  • Thread starter Thread starter Ifeatu Osegbo
  • Start date Start date
Status
Not open for further replies.
I

Ifeatu Osegbo

I have set up Exchange 2010.

I have installed everything and am able to receive emails from external world but I cannot send to them, eg I cannot send to Yahoo.

I have used the Exchange Test Connectivity here: https://testexchangeconnectivity.com and everything worked fine.

I have also configured the Send Connectors and everything seems fine, yet, I cannot send emails to external addresses.

Internally, everything works fine. Please help

Ifeatu!
 
Are you getting NDR's? Emails in the queue? Is Exchange HUB the last hop to the Internet or is it passing through a smarthost/Edge server? Do you have port 25 outbound open on your firewall?
 
Yes, I have the following:

451 4.4.0 Primary target IP address responded with: " 421 4.2.1 Unable to connect." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.

The Exchange is Hub, no Edge at all, no smart host at all.. Port 25 is open and I confirmed with telnet.

Thanks for your prompt response.
 
Is there coexitence with older version of Exchange? How many Send Connectors have been created? How many HUB servers to you have? If no one can send outbound, sounds like a mis-configuration or a DNS lookup issue.

Can you run Get-SendConnector | fl and post the results? Looking for AddressSpaces, DNSRoutingEnabled, SmartHosts, SourceTransportServers, Enabled, port

 
Do you have a one-to-one NAT configured for your Exchange server that corresponds to the IP listed on your MX records? If so, check to make sure that your domain is not listed on any Real-time Black Lists (RBL's). You can check here: http://mxtoolbox.com/blacklists.aspx
 
Thanks all.

No, there is no coexistence with any Exchange Server. I have up to 4 of them, yet nothing is happening.

No one can send outbound mails.

The Get-Send-Connector gives this:

AddressSpaces : {SMTP:*;1}
AuthenticationCredential :
Comment :
ConnectedDomains : {}
ConnectionInactivityTimeOut : 00:10:00
DNSRoutingEnabled : True
DomainSecureEnabled : False
Enabled : True
ForceHELO : False
Fqdn : mailserver.domain.com
HomeMTA : Microsoft MTA
HomeMtaServerId : mailserver
Identity : OUTGOING INTERNET MAIL
IgnoreSTARTTLS : False
IsScopedConnector : False
IsSmtpConnector : True
LinkedReceiveConnector :
MaxMessageSize : 10 MB (10,485,760 bytes)
Name : OUTGOING INTERNET MAIL
Port : 25
ProtocolLoggingLevel : None
RequireTLS : False
SmartHostAuthMechanism : None
SmartHosts : {}
SmartHostsString :
SmtpMaxMessagesPerConnection : 20
SourceIPAddress : 0.0.0.0
SourceRoutingGroup : Exchange Routing Group (DWBGZMFD01QNBJR)
SourceTransportServers : {mailserver}
UseExternalDNSServersEnabled : False

AddressSpaces : {SMTP:*;1}
AuthenticationCredential :
Comment :
ConnectedDomains : {}
ConnectionInactivityTimeOut : 00:10:00
DNSRoutingEnabled : True
DomainSecureEnabled : False
Enabled : True
ForceHELO : False
Fqdn : mailserver.domain.com
HomeMTA : Microsoft MTA
HomeMtaServerId : mailserver
Identity : Outgoing Internet Mails
IgnoreSTARTTLS : False
IsScopedConnector : False
IsSmtpConnector : True
LinkedReceiveConnector :
MaxMessageSize : 10 MB (10,485,760 bytes)
Name : Outgoing Internet Mails
Port : 25
ProtocolLoggingLevel : None
RequireTLS : False
SmartHostAuthMechanism : None
SmartHosts : {}
SmartHostsString :
SmtpMaxMessagesPerConnection : 20
SourceIPAddress : 0.0.0.0
SourceRoutingGroup : Exchange Routing Group (DWBGZMFD01QNBJR)
SourceTransportServers : {mailserver}
UseExternalDNSServersEnabled : True

AddressSpaces : {SMTP:*;1}
AuthenticationCredential :
Comment :
ConnectedDomains : {}
ConnectionInactivityTimeOut : 00:10:00
DNSRoutingEnabled : True
DomainSecureEnabled : False
Enabled : True
ForceHELO : False
Fqdn : mailserver.domain.com
HomeMTA : Microsoft MTA
HomeMtaServerId : mailserver
Identity : L1
IgnoreSTARTTLS : False
IsScopedConnector : False
IsSmtpConnector : True
LinkedReceiveConnector :
MaxMessageSize : 10 MB (10,485,760 bytes)
Name : L1
Port : 25
ProtocolLoggingLevel : None
RequireTLS : False
SmartHostAuthMechanism : None
SmartHosts : {}
SmartHostsString :
SmtpMaxMessagesPerConnection : 20
SourceIPAddress : 0.0.0.0
SourceRoutingGroup : Exchange Routing Group (DWBGZMFD01QNBJR)
SourceTransportServers : {mailserver}
UseExternalDNSServersEnabled : True

AddressSpaces : {smtp:*;1}
AuthenticationCredential :
Comment :
ConnectedDomains : {}
ConnectionInactivityTimeOut : 00:10:00
DNSRoutingEnabled : True
DomainSecureEnabled : False
Enabled : True
ForceHELO : False
Fqdn : mailserver.domain.com
HomeMTA : Microsoft MTA
HomeMtaServerId : mailserver
Identity : Internet
IgnoreSTARTTLS : False
IsScopedConnector : False
IsSmtpConnector : True
LinkedReceiveConnector :
MaxMessageSize : 10 MB (10,485,760 bytes)
Name : Internet
Port : 25
ProtocolLoggingLevel : None
RequireTLS : False
SmartHostAuthMechanism : None
SmartHosts : {}
SmartHostsString :
SmtpMaxMessagesPerConnection : 20
SourceIPAddress : 0.0.0.0
SourceRoutingGroup : Exchange Routing Group (DWBGZMFD01QNBJR)
SourceTransportServers : {mailserver}
UseExternalDNSServersEnabled : True

I checked the MXTOOLBOX and it is not there.

Note I used the Mail Flow Troublshooter and I had an issue like this:
Mail submission failed: Error message: The SMTP host was not specified..

Thanks
 
So you have 4 different Send connectors? This is your problem, they all have the same address space. If you have 4 HUB servers you can add all four HUB servers to the same send connector. Delete all of the send connectors except for one of them and add all HUB servers to use this connector.
 
ok good, so one send connector and one hub...restart the transport service. Does it work now?
 
Thanks. But It has not dropped into the External Recepient mailbox.

I noticed the no. of messages in the Queue reduced and I had more Messages on the Message tab of the Queue Viewer.
 
Can you run the Get-SendConnector again. I see that you have UseExternalDNSServersEnabled = true. Do you have some defined. If you disable this, it will use your internal DNS servers. Unless there is a particular reason for using ExternDNS server, I would not check this box.
 
Ok...it shows:

AddressSpaces : {smtp:*;1}
AuthenticationCredential :
Comment :
ConnectedDomains : {}
ConnectionInactivityTimeOut : 00:10:00
DNSRoutingEnabled : True
DomainSecureEnabled : False
Enabled : True
ForceHELO : False
Fqdn : mail.domain.com
HomeMTA : Microsoft MTA
HomeMtaServerId : mail
Identity : Internet
IgnoreSTARTTLS : False
IsScopedConnector : False
IsSmtpConnector : True
LinkedReceiveConnector :
MaxMessageSize : 10 MB (10,485,760 bytes)
Name : Internet
Port : 25
ProtocolLoggingLevel : None
RequireTLS : False
SmartHostAuthMechanism : None
SmartHosts : {}
SmartHostsString :
SmtpMaxMessagesPerConnection : 20
SourceIPAddress : 0.0.0.0
SourceRoutingGroup : Exchange Routing Group (DWBGZMFD01QNBJR)
SourceTransportServers : {mail}
UseExternalDNSServersEnabled : True

Do you recommend I disable the External DNS?
 
Did you specifically tell it what External DNS servers to use? If not, then it will fail. Try disabling it and restarting the Transport service. Then see what happens.
 
I am not sure I did, that, everything is default. How do I tell it which one to us?
 
See this link:

http://technet.microsoft.com/en-us/library/aa997285.aspx

Use the External DNS Lookup settings on the transport server Select this check box if you want to use a specific list of external DNS servers instead of the DNS servers configured on the network adapters of the source servers configured for this Send connector.
Important: Verify that you have configured the external DNS servers list by using the Set-TransportServer cmdlet, or by using the External DNS Lookups tab in the properties of the Hub Transport server object or the Edge Transport server object.

 
Thanks. I tried it with no luck.

I had to add 2 dns servers from our ISP.
 
So it works after adding the two external DNS servers from your ISP? IF you have External DNS enabled, you must have servers listed, if you don't have external servers in the list then you must not enable external DNS.

Please let me know if you resolved your issue and it is working now.

 
It did not work after the IP address was added. I still see the previous:

451 4.4.0 Primary target IP address responded with: " 421 4.2.1 Unable to connect." Attempted failover to alternate host, but that did not succeed. Either there are no alternate hosts, or delivery failed to all alternate hosts.

Should it be any thing with the MX records?
 
Also, I wish to note that I had created some email address policies ealier.

We had a .biz domain and we used POP3 to pull all the emails to the .com domain.

But on the Queue, I see the Outgoing email address as me@domain.biz instead of me@domain.com can this be part of the reason for the problem?
 
Hello,

I figure out that outbound SMTP traffic is not allowed to leave my lan here.

I can telnet to external smtp servers from outside our network, but I cannot do same from our network.

I have called the ISP and they said they did not block it. I wil get to talk to the Cisco guys tomorrow.
 
Status
Not open for further replies.
< “additional” mailbox cannot be removed from an Outlook 2007 client’s mailbox | Public folders woes (script to change subject line of messages) >
Similar threads
Thread starter Title Forum Replies Date
M Outlook 2010 Outlook 2010 with O365 / Exchange Online Using Outlook 0
Diane Poremsky Organizational Forms Library in Exchange 2010 Using Outlook 0
V Recover exchange 2010 edb Exchange Server Administration 2
B Exchange 2010 / Outlook 20070 "client error in synchronization log" Exchange Server Administration 1
T Renaming an Resource in Exchange 2010 Exchange Server Administration 1
P Outlook 2010 MS Exchange Calendar to Android- ical or webdav? Using Outlook 1
Fozzie Bear Outlook 2010 or 2013 Dual Configuration Exchange + IMAP Exchange Server Administration 6
H In Exchange 2010, how to block an email containing an attachment that has foreign characters Exchange Server Administration 1
Digitally Hip Outlook 2010 (32) and Exchange 2010 (sp3) sender info not displaying in Outlook Using Outlook 1
A give User Read Only access to secondary mailbox in Exchange 2010 via AD Exchange Server Administration 1
N Outlook 2010 exchange - auto-move emails from @domain Exchange Server Administration 1
V Outlook 2013 cant stay connected to exchange 2010 Exchange Server Administration 5
D cleaning up old Exchange 2003 data on Exchange 2010 Exchange Server Administration 2
L Weird Inbox problems Outlook 2010/13 and Exchange Exchange Server Administration 2
R Exchange 2013/Outlook 2010 Slow Startups Exchange Server Administration 8
Z Outlook 2010 client to Exchange ,,,,search not working proparly Exchange Server Administration 0
M First post -help with managing two calendars Outlook 2010 /Exchange 2010 Using Outlook 0
T Outlook INBOX emails gone back 2-3 weeks after Exchange Server 2010 Restart Using Outlook 0
A Exchange 2003 Outlook 2010 64 Bit- AutoDiscover Connection Err - Certificate Exchange Server Administration 9
C Outlook 2010, two exchange mailboxes configured.Unable to see 2ndrymeeting req Using Outlook 2
C Exchange 2010 / Emails received show with display name and not email address Using Outlook 2
P correct public folder migration exchange 2003 to 2010 Exchange Server Administration 1
S Unable to send or reeceive email in new Exchange 2010 Exchange Server Administration 0
A File - Save Attachments does nothing in Outlook 2003 with Exchange 2010 ... Using Outlook 3
B Sharing Multiple Outlook 2010 Calendars (Exchange) Exchange Server Administration 4
P can't set IRM configuration in Exchange 2010 Exchange Server Administration 2
B Using hosted exchange to sync outlook 2010 calendars and contacts to BB Z10 Using Outlook 4
S Outlook 2010/Exchange 2010 Multi Mailboxes (Server unavailable) Using Outlook 6
O outlook 2010, owa, exchange Exchange Server Administration 2
D why do exchange contacts not sync properly from outlook 2011 to outlook 2010 Exchange Server Administration 2
J Exchange 2010 free/busy shows hashmarks in scheduling tab when not organizer Exchange Server Administration 6
C Exchange 2010 - Outlook 2010 - Exchange Server Administration 4
Fozzie Bear Outlook 2010 wont remember Exchange Credentials on log off /shutdown of Win7 Exchange Server Administration 2
T Exchange 2010: 'could not save item' and 'Unknown error' when edit calendars Exchange Server Administration 1
I Shared Contacts in Outlook 2010 and Exchange Server 2010 Using Outlook 4
A emails disappearing from inbox outlook 2010 exchange server 2010 major trouble Exchange Server Administration 6
J OL2003 Public Folder Sync Errors w/ Exchange 2010 Exchange Server Administration 11
B Outlook 2010 won't configure exchange account, 0kb .ost file Exchange Server Administration 5
R Thousand of sync issues on Outlook clients with Exchange 2010 Exchange Server Administration 5
R Create a contacts list on Exchange 2010 Exchange Server Administration 10
T Exchange / Outlook 2010 - How to cancel meetings but retain the calendar entry Using Outlook 4
S Outlook Quick Steps - Exchange 2003 / Exchange 2010 Exchange Server Administration 2
R Sharing Exchange 2010 calendars with people outisde our organization Exchange Server Administration 17
A Exchange 2010 Outlook 2010 and Local Failures sync issue Exchange Server Administration 5
B Exchange 2010 / Outlook 2010 - Group Folder issues Exchange Server Administration 6
U Exchange 2010 & mailbox database Quotas Exchange Server Administration 1
T Outlook 2010/Exchange 2003: Meeting Organizer doesn't show Using Outlook 1
C Outlook/Exchange 2010 Recover Deleted Items to original folder Using Outlook 2
D large mailbox question using 2010 on exchange 2k3 Exchange Server Administration 2
R Change Outlook 2010 Exchange server address via registry or script Using Outlook 5

Similar threads

Back
Top