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- Wed May 29, 2019 1:32 pm
- Forum: Discussions on Spam Protection Policies and Default Rules
- Topic: What the hell??
- Replies: 1
- Views: 23948
What the hell??
Sorry, we were unable to deliver your message to the following Sorry, we were unable to deliver your message to the following address. <xxxxxxxx@xxx.com>: 550: 5.7.0 Mail from domain [patrick@xxxxxxxxxx.net] is missing A or MX DNS record. See http://spamauditor.org/best-practices/valid_from_address/...