VPN blocks outgoing emails with recommended settings

Hello Peter,

We're sorry for the inconvenience caused.
We see that you've contacted us regarding the same issue and the case has been escalated as well.
Our senior team emailed you on June 1, 2021 regarding this issue.
We request you to check for the email.
Thank you for understanding in advance.

Even with recommended SMTP settings - port 465, SSL TLS encrypted connections, and with authentication - my VPN blocks outgoing messages. What's the next trick?

Hello Peter,

We're sorry for the inconvenience caused.
We see that you've contacted us regarding the same issue and the case has been escalated as well.
Our senior team emailed you on June 1, 2021 regarding this issue.
We request you to check for the email.
Thank you for understanding in advance.

Hi Peter,
Thank you for your reply.
If you find it difficult to follow the steps suggested by our senior team, we have offered you with remote assistance to your registered email address. Please check your email and follow the steps to connect to remote agent to resolve your issue.
Thank you.