535: 5.7.3 Authentication unsuccessful

Anonymous
2020-04-16T10:47:36+00:00

Hello,

I have an issue when using an O365 account and sending emails from an application.

The application has been suitable to use tls/starttls, port 587, ect.

When entering an email account and password, the following message occurs:

"535: 5.7.3 Authentication unsuccessful"

I would like to understand, what are the mininal features of an O365 account so that it can be used from another application.

I have performed different tests, which allow me to indicate that the account is Ok.

Thank you.

Microsoft 365 and Office | Subscription, account, billing | For home | Windows

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

52 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. Anonymous
    2020-08-17T22:28:20+00:00

    Thanks for the insight!

    Will try to do this tomorrow and let you guys know if it worked out for me.

    Godaddy should talk to their Outlook 365 provider and tell them to enable SMTP per default instead of all this hasle...

    Cheers.

    Was this answer helpful?

    0 comments
  2. Anonymous
    2020-08-17T22:30:21+00:00

    Yeah the whole thing has been a game of hot potato for me before figuring this out.  Please mark the original post as the accepted solution if this solved the problem for you.  Good luck! :-)

    Was this answer helpful?

    0 comments
  3. Anonymous
    2020-08-18T20:01:13+00:00

    So, how does this change if using a MAC? I have had same SMTP problems with both HP and Brother.  Agree with all re: godaddy support sucks.

    Was this answer helpful?

    0 comments
  4. Anonymous
    2020-08-18T22:29:21+00:00

    Was this answer helpful?

    0 comments
  5. Anonymous
    2020-08-23T05:39:39+00:00

    Thanks darrell,my problem is fixed with security default disable in azure active directory, but there is delay in mails, may i know what might me the problem.

    My mail server time zone is configured with india time and server hosted is in singapore.

    is that a problem??

    Was this answer helpful?

    0 comments