Sorry for the previous, I don't wish to make things complicated, so focusing on my in-house server. I have moved my application server to use this server and I see mail is going out, to the main google, yahoo, etc. but get one deferred on an .edu server. The error is "host mail-mx1-prod-v.cc.nd.edu[129.74.250.243] said: 451 4.1.8 Possibly forged hostname for myIP (in reply to RCPT TO command)
Now, the problem is simply that 'ourdomain.com' is hosted at google and we cant relay though him. Our application sends mail from noem...@mydomain.com. Now I guess there doing a comparison to the mx on mydomain.com which points to google then where the mail came from. So the easy question is am I correct? Next, can I setup my inhouse postfix to send mail from mydomain.com or will I have issues later (this could be just the 1st). If not, I guess my other option is looking for all the places mail get's sent and change the name to like noem...@sub.mydomain.com and then use that. So now the question is easier, am I correct with #1 (if so I am wondering how others that use google are getting around it). Thanks
