Exchange is receiving but not sending via mail server - ?

[MatthewLightbourn]

Hi guys,

Today after 4 days of messing around with our Alcatel pain in the butt router, ADSL provider, web & mail hosters, etc my office finally has migrated the mail system from a scheduled dial up driven exchange server to an ADSL driven new Exchange server and is accepting mail inbound via port 25 and all that - hooray!

But, we can send to each other internal mail instantaniously but cannot reply to or send a new mail doc to the outside world - 'System Administrator could not send to the following recipient'

I know that we are set-up all well and good but the outgoing settings are obviously wrong on the new mail server.

Can anyone lead me in the right direction into what the setting should be and if it is per individual mailbox or a global setting that I need to chage.

Thanks

Matt Lightbourn

 

[brontosaurus]

global setting. on your IMS under Connections, what are you using for delivery, DNS or a specific host? IF DNS, do you have an internal DNS server or do you just use your ISP? Then, on your Exchange box's NIC, what IP's are you using for Primary and Secondary DNS?

 

[29rosemont]

Yes, check your DNS settings. I had this exact problem after switching my Exchange server to new hardware. The server TCPIP settings were trying to resolve each email domain on the wrong DNS server. Just to be sure also check your filter/firewall settings on your new router.

PaulG

 

[TheIronMan]

What's above, plus...

Make sure that your ISP has registered the correct IP address of your mail server in the MX record of their DNS servers.

Cheers!