MailClient.Accounts.AuthenticationAbortedException

[Gary]

Problems when sending emails via SMTP with outlook.com accounts

This week Microsoft made some changes on their mail servers, which disabled OAuth login for the SMTP protocol on their accounts. This means those using free MS accounts, such as @outlook.com, @hotmail.com, @live.com and similar stopped being able to send emails from eM Client, the messages either got stuck in Outbox or you received this error: [SMTP] MailClient.Accounts.AuthenticationAbortedException: Authentication aborted. We have reported the problem to Microsoft and also created a workar…

[niko14]

Thank you for your prompt response . I will try the suggested solution and hopefully the workaround is helpful.

[niko14]

I can confirm that setting up the account with an older version of the OAuth authentication works so far. Thanks!

[carlos_takeapps]

@Gary Could you please pin or highlight the suggested solution so far? And also point clearly that this is not a problem with specific account or account providers but an issue with the program that is being addressed (?).

Thanks…

[cyberzork]

@carlos_takeapps

Could you please pin or highlight the suggested solution so far?

The temporary solution for the Microsoft sending mail issue causing the error “[SMTP] MailClient.Accounts.AuthenticationAbortedException: Authentication aborted” if you have an eg: Outlook.com, Hotmail.com or Live.com or similiar MS acct is in the eM Client support page link below which is also (at the bottom) of the link above that @Gary already advised.

https://support.emclient.com/index.php?/Knowledgebase/Article/View/256/7/cannot-send-emails-for-outlookcom-accounts---authentication-aborted

And also point clearly that this is not a problem with specific account or account providers but an issue with the program that is being addressed (?).

This specific issue is with Microsoft and not eM Client as per the eM Client support pages advise.

[carlos_takeapps]

Hi, @cyberzork .

Well, eM Client Support page can the issue is with the NASA or an alien attack, if they want. But the truth is that no other email client I use has been affected (Windows, MacOs, Android, iOS).

Not to mention is taking for ever to release a serious fix. So… from the customer perspective I have, this is a problem with eM Client, in all platforms.

When will a version with a fix be released?

(Maybe they can try hiring more o better developers instead of so many moderatos that provides misleading information)

[Gary]

@carlos_takeapps

But the truth is that no other email client I use has been affected

Thunderbird have now also released a fix for this. But some apps may not be affected because they use an older form of oAuth. That is where the issue arises as your provider documented that they use modern oAuth, and they did until recently, but then they broke their implementation.

@carlos_takeapps

When will a version with a fix be released?

Unfortunately the issue is not with eM Client otherwise we would have already fixed it. But we did release a workaround so you can continue to send until your email provider can fix it.

[JRichmond]

Tried this fix and it worked but now it’s back to the same issue of not being able to send mail. I have tried adding and removing the patch and neither works. I can receive mail fine but not send anything.