My 2c: I know it sucks when your mail doesn't get through, I've had the same issue with att.net, but gmail.com has never been a real problem for me. I have a l

My 2c: I know it sucks when your mail doesn't get through, I've had the same issue with att.net, but gmail.com has never been a real problem for me. I have a lot of mail that gets forwarded to gmail, including from cron that goes to my own mailbox at gmail. I sometimes have to unmark it as spam, but not too often. My IPv4 doesn't even have a custom rDNS -- only provider-specific one -- nor have I bothered to implement DKIM, although I do have SPF and am also registered for Webmaster Tools (although I somehow doubt that really matters).