I set up SBS2008. All is working correctly (Incoming internet email, Inter office email, RWW, OWA ...)
except I can't send external/internet emails.
I googled and tried various suggestions, but still it does not work.
In Exch Queue Viewer: 451 4.4.0 Primary target IP address responded "421 4.2.1
Unable to connect. "Attempted failover to alternated host, but that did not succeed.
Either there are no alternate hosts, or delivery failed to all alternate hosts".
Environment: Dynamic IP by Time Warner who confirmed they do not block outgoing emails.
Domain Name: mssonline.com
MX Record: Setup correctly according to mxtoolbox.com. But this IP address is trapped by
SORBS-DUHL & Spamhaus-ZEN due to the fact that it is DYNAMIC.
Smart Host: I am using it. I like to use my EXCH to host internet email
Ports on my Linksys Router: 25, 443 ,987, 4125
SEND CONNECTOR Configuration:
- FQDN : mail.mssonline.com (it showed remote.mssonline.com originally)
- Address Space: smtp * 1
- Network : Use domain name system ... automatically
- Souce Server : MSS01 which is the name of SBS Server
Edge Subscriptions: None created
Transport Rules: None created