Got “5.7.1 Client was not authenticated” error

  • Hi Team,

    I had troubled by sending an emails in wordpress website, that is why I am using POST SMTP plugin to send an email.
    In configuration, I had check with SendGrid API as well by using API key, but still not able to send any emails through the same.
    I got this error “ERROR: Status code is 0” while testing through SendGrid API.

    I am also trying to send with other API (POST SMTP) by setting host: mail.indecomm.net and port: 587, but still not able to send any test emails as well.
    Got “5.7.1 Client was not authenticated” error while testing emails.

    what should be the root cause of this issue?

    The page I need help with: [log in to see the link]

Viewing 1 replies (of 1 total)

  • We are also facing this issue with POST SMTP with SendGrid as well
    “ERROR: Status code is 0”

    The issue is actually causing our WooCommerce store to duplicate orders and take payment twice

Viewing 1 replies (of 1 total)
  • The topic ‘Got “5.7.1 Client was not authenticated” error’ is closed to new replies.

Tags