SMTP Setep with Office365 account

[hermit66]

Hi,

I am trying to connect to the SMTP server associated with my Office365 account and am getting the error:

The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.57 SMTP; Client was not authenticated to send anonymous mail during MAIL FROM [CWXP265CA0050.GBRP265.PROD.OUTLOOK.COM]

I have checked and double checked the settings, username and password and they are all correct. I have also been able to use the settings via a PowerShell session on my PC to be able to send email successfully through the Office365 SMTP server using this account, so I know that the problem isn’t with the acocunt or the Office365 SMTP server.

Has anyone else experienced this issue, and if so what did you manage to do to solve it ?

Thanks in advance for any assistance you are able to provide.

[QFMathew]

Hello @hermit66

I’ve done a search on this as I done have any experience with this, nor do I have access to an Office365 account to test it with.

The results have come back with either the from address doesn’t exist (e.g. it’s an alias for an account), or the password has expired.

There is another solution posted on a Microsoft Forum which suggests using a different SMTP server than the one you have in your screenshot.

I hope this helps, but please do let us know how you get on

[hermit66]

Hi @QFMathew,

Thank you for your quick response. The account does have several aliases, though the one I have been trying is the primary alias and the one that I use to log in everywhere else.

Anyway, I have tried one of the other aliases and it worked successfully, so things are now up and running.

Thank you.