Delivery failed 5 attempts: MyEmail@gmail.com
Body of message generated response:
451 4.5.0 SMTP protocol violation, see RFC 2821 23si6651713hsd.10
I went and checked out RFC 2821 like a good admin and checked each of the points. I had a abuse account, a postmaster account... But I was not an open relay to begin with. WTF?
This happened shortly after an upgrade from iMail 2006 to iMail 10.01 (2008). I checked my settings and then rechecked my settings. I had enough and called into IPSwitch Support. Strangely I got one of the lead developers on the phone who worked with me. After a few hours of him poking around my production mail server he kinda shrugged his shoulders and gave me a
Not so reassuring...
Not at all. I started sending test messages to other accounts on the web and I was not seeing any issues. Again I said
WTF? Why is Google hating on me?
Then I noticed it. There was a footer at the bottom of my email that was in my AskTheAdmin.com account, and I had eliminated that footer almost 3 years ago. I asked the tech support dude about it and he said it would live in a file called trailer.txt in the iMail root folder. I deleted it and WHAMO!
Gmail was listening to me again.
A very grueling few hours with loads of people making up excuses on how they need to email people on gMail for work... YEAH RIGHT! Did you think I wasn't working on it?
Don't you have some TPS reports that need to be filed on those new cover sheets?