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smtp;550 5.7.1 Access denied
It looks like a PTR record does not exist. I'm contacting my registrar now to add it. I hope it fixes it.- zoom77
- Post #13
- Forum: Microsoft: Exchange
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smtp;550 5.7.1 Access denied
I've also just started to get this problems. About 2 weeks ago the users were on a Cobalt Cube from Comcast Business. That got hacked and it was on a blacklist. Since then we have setup an Exchange server. Today they are having problems send out email. The DNS looks okay. Anything else I...- zoom77
- Post #11
- Forum: Microsoft: Exchange
