By the way, how did you figure out that network was blocked? Is there a looking-glass-alike I can use to check? The reason I ask is because that particular ne

By the way, how did you figure out that network was blocked? Is there a looking-glass-alike I can use to check? The reason I ask is because that particular network you mentioned is only one of dozens that Google serves up as the A record for gmail-smtp-in.l.google.com. From my location, it's on 74.125.25.26 instead. And the MX for Google Apps hosted domain customers (including google.com itself) is aspmx.l.google.com, which (again from this location) is 173.194.79.27 or 74.125.28.26 or 74.125.20.27 or one of dozens of other IPs.