Cannot send emails

Hello Carlos,
Thank you for contacting AVG Community Support.
We are really sorry to know this. We'll certainly check and help you out.
Please let us know the AVG subscription that you have recently installed on your PC.
On verifying the AVG subscription, I'll help you with the necessary steps.
Thank you and keep us updated.

After downloading the AVG my outlook (microsoft 365) does not send out emails and gives me this msg-"Sending reported error (0x80042109) outlook cannot connect to your SMTP email server.
How to fix it?

Hello Carlos,
Thank you for contacting AVG Community Support.
We are really sorry to know this. We'll certainly check and help you out.
Please let us know the AVG subscription that you have recently installed on your PC.
On verifying the AVG subscription, I'll help you with the necessary steps.
Thank you and keep us updated.