Email settings does not work after installing nextcloud 14

A problem occurred while sending the email. Please revise your settings. (Error: Connection could not be established with host domain.com [ #0] Log data: ++ Starting Swift_SmtpTransport !! Connection could not be established with host domain.com [ #0] (code: 0)

When I try to send email from basic settings it gives me this error

Can anyone help?

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The issue you are facing:

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Cannot confirm this. Email works fine here. Did you check your email settings?

Yes the settings are correct but yet it is not working. With the same configuration, I can access my email on email clients.

well it would be nice if you could give out some more details about your setup/environment and such… don’t forget to put some logfiles, as well…

Are you using the Sendmail or the SMTP Method? Seems SMTP, looking at your initial report. I just tried both methods and both work. Make sure you select the correct encryption and port settings.