Quote:
Originally Posted by lpn
Perhaps these companies are using a transaction email provider that for some reason has not updated the DNS records of your domain.
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Possibly, but why then do the messages not arrive in the Google mailbox? Does Google reject mail for active accounts if it detects that its MX servers are not in the current DNS? That would be a bit surprising because we tend to rely on the fact that messages may arrive at either the old or new mail server, for a limited time, when migrating from one system to another.