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All Tags » 550

  • Envelope Sender: Domain must resolve in DNS!

    We've got an exchange server, hosted on a Zen connection, and randomly, users get the above error when sending emails. I've inserted 555 in the email addresses to (hopefully) prevent spamming  Generating server: diamond.cor.local Support@rhombus-systems.com555smarthost03.mail.zen.net.uk #550 Envelope Sender: Domain must resolve in DNS! ...
    Posted to Email (Forum) by delcara on July 17, 2008

  • 550 error "Unable to verify sender"

    Hi, I've recently switched hosting company and today for the first time have had trouble sending out an email via the Zen smtp server. I'm sending emails from my own domain, which is hosted by a third party. The DNS records look to be in order but I get the following error (only when I send to one particular address - so far) - I've *ed out the ...
    Posted to Email (Forum) by meesteryan on April 30, 2008