Mail delivery failed via SMTP server 'None'

Question

Hello,
I have an Odoo instance installed on a VPS associated with a domain name (my-domain.com) and I have properly configured the outgoing mails server (test successful) but when I try to send  reset password instructions I get the following error:

Mail delivery failed via SMTP server 'None'.
SMTPSenderRefused: 451
Temporary local problem - please try later
mail.bounce.alias+441-res.users-19@mail.catchall.domain
I am confused about what should be the values of mail.catchall.domain and mail.bou

Wennaël LOONIS · Answer

It seems that the problem does not come from catchall or bounce. It looks like the email address you are using to send emails is not recognized by your outgoing server. Check that the sender is known. If this is not, change the OdooBot email (archived contact) to put an email known to the SMTP server

Rolf Schaufelberger · Answer

Same problem here, I wonder, where the address    mail.bounce.alias+441-res.users-19  ( or in my case bounce+141@...    or   bounce+139-project.task-82 @... ) are coming from.
rs

rehan · Answer

just for example try to make it like this for your outgoing mail server:
these are the important things to set the outgoing mail server
1. SMTP Server = smtp.gmail.com
2. SMTP Port = 465
3. Connection Security = SSL/TLS
4. username = {your_email}
5. password = {your_password_email}

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