2023/6/22-Cause. Incorrect or missing PTR record of the sender's mail server. Resolution. Contact the server hoster or provider of the IP address in ...
2022/1/27-The server rejects emails sent from one of these domains. '450 4.7.1 Client host rejected: cannot find your reverse hostname'; If the Exchange ...
2018/5/8-The error suggests the destination server is unable to lookup a PTR record for the IP it is receiving the connection from. You may want to ...
2014/12/23-1 Answer 1 ... You need a PTR record that resolves 128.199.39.109 to the hostname of your sending server. Might also want to look into SPF records ...
2012/9/7-This error message is seen when you have sent an email and the remote server rejects the email. In your exchange 2010 or Exchange 2007 queue ...
2017/11/26-1 Client host rejected: cannot find your reverse hostname is encountered. We strongly advise contacting your recipient's email provider to check ...
2013/11/8-When a user here sends an email to a particular domain it bounces back with: 450 4.7.1 Client host rejected: cannot find your hostname. I'm ...
2013/11/22-I've been unable to message users at the domain kupwg.de, and the SMTP error I get is: 450 4.7.1 Client host rejected: cannot find your hostname.