Error when sending mail in New Outlook - Windows 11

[colh2002]

I am using new outlook with windows 11. I get a successful account creation message and I can receive mails ok. When I try to send a mail i get the following error

Technical details

SmtpSubmissionPermanent5XXException: Smtp submission failed. Server 'smtp.talktalk.net' Port '587'. --> Unexpected SMTP server response. Expected: 235, actual: 535, whole response: 535 5.7.0 hQGJr3f2Wax05 Authentication Credentials Invalid (TT300)
 
Failure code: cf24

Any ideas on how to resolve this

Regards 

[Gondola]

Hi @colh2002 

TT300 is a credentials fail which means the outgoing server is not accepting the password.

Is the password correct and importantly, strong enough? At least 8 characters, multicast letters and at least one number and one symbol.

[Divsec]

Hi @colh2002 I've found new Outlook to be very difficult and reverted to regular.

Your post has been escalated and you should hear soon from someone more qualified, good luck and I look forward to reading your solution.