Get more info about an IP address or domain name, such as organization, abuse contacts and geolocation.
One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.
This is the Postfix program at host 112233-www1.web.mydomain.com. I'm sorry to have to inform you that your message could not be delivered to one or more recipients. It's attached below. For further assistance, please send mail to <postmaster> If you do so, please include this problem report. You can delete your own text from the attached returned message. The Postfix program <email@example.com>: host domain-smtpin.mail.rr.com[184.108.40.2064] said: 554 5.1.8 - Domain of sender address firstname.lastname@example.org does not exist (in reply to MAIL FROM command)
Join the community of 500,000 technology professionals and ask your questions.