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Outbound mail not working
tribe_menx
Hi People
Am not much of a exchange person well this is my first exchange set-up , everything seems to be working fine OWA incoming mails working fine except cant seem to send mails to the outside world wen I check on the queue I see the mails are stuck there
When i run the troubleshoot assiatnt i get this error when its checking for remote delivery queue
Cannot find Host or MX records for domain gmail , yahoo .. etc
My set up is simple
One DNS server 2008 , exchange 2010 , got a public IP (did the port forwarding on the firewall as well and checked at testexchange.com )checked the nslookup and everything seems fine
my domain is set up internally i got domain.local while outside is domain.com.na
or yes dont have a edge transport server yet or any anti-spam software
Can someone please guide me wat am doing wrong
Thanks
V
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jamesp1983
How is your send connector configured? What roles are installed on this server? CAS, MB, and HT?
tribe_menx
All those roles are set up on a single server running server 2008, The send connector is configured for internet smtp* I use DNS MX Am not using any smarthost .. thats about it is a very simple set up ...
NB my mail server is behind proxie and only two ports are open on the fire thats smtp 25 and 443 for https
Chivalry1
This is likely a problem with DNS. Perform some nslookup's for yahoo, gmail, or hotmail;s mail domain from the command line on the Exchange server.
Check your event logs for DNS related errors and notifications.
tribe_menx
Yes i just checked it seems my DNS cannot resolve outside domains like yahoo, google them
jamesp1983
How about forwarders or root hints? What are you using?
tribe_menx
Forwarders I'm using my firewall pfsense ( its both my firewall and my proxy server ) Ip address as a forwarder ,on the firewall only 2 ports open there 25 and 443 .. I did not set up any root hints
blargoe
If you manually set the network adapter of one of the computers to use the pfsense for DNS, does it work?
tribe_menx
Will try that , I got some mails going through now mostly namibian domains mails are going through but others like the yahoo gmail hotmail mails are still stuck in the queue the error am getting now cannot resolve MX records of those domains but the A records are getting resolve , and for some reason port 25 of those domains cannot be found (made some telnet test ) and yes did some rbl test an my domain is not blacklisted, am doin something wrong an cant quite figure it out yet
jamesp1983
how about reverse dns?
tribe_menx
Did reverse dns are correct including PTR records ( did call my ISp who supplied me with the public IP ) only thing not set up is SPF, not sure if u need spf records to mail to some top domains .... am gettin mails out to some domains but not all send connector is added correctly .... see is my first exchange gig i new it will give me a headache
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