Strange SMTP Authentication Issues

  • Resolved WP CMS Ninja

    (@billiardgreg)


    1 year ago

    Has anyone run into an issue where the same credentials on different servers are not working?

    On one of my servers, the same credentials and login information is returning a “SMTP Error: data not accepted.” where it is sending out emails fine on another.

Viewing 3 replies - 1 through 3 (of 3 total)
  • Thread Starter WP CMS Ninja

    (@billiardgreg)

    I took a look at the transcript and it ends with: SMTP ERROR: DATA END command failed: 554 Transaction failed: Missing start boundary SMTP Error: data not accepted.

    and keep in mind I have tested on the same server with two different systems. One can send and one can not using the PostSMTP test Message.

    furqanfazal

    (@furqanfazal)

    Hi @billiardgreg,

    I hope you are doing well.

    Thank you for contacting us regarding the issue you are facing.

    The ‘data not accepted’ error usually means that your SMTP server is rejecting the information that your site is attempting to send. It can occur due to a mismatch between the email address you’re using in a Post SMTP plugin and the one you’re attempting to send from.

    Also, check the box ‘Prevent?plugins?and?themes?from changing this’ in All Settings > Message Tab.

    I hope this will help you!

    Thanks and regards,
    Support Team – WPExperts?

    Thread Starter WP CMS Ninja

    (@billiardgreg)

    Just to update you, even though there was no notation saying that the credentials were deactivated. After a 3rd time of recreating them, I was able to successfully get it to start sending back out again. Was a very frustrating issue that turned out to not even be related to the software. Thank you.

Viewing 3 replies - 1 through 3 (of 3 total)
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