On Thursday 08 April 2021 at 16:39:50, Santanu B wrote:

please unsubscribe my email from the mail list, thank you

As the headers of your own email (and every other one on this list) say:

List-Unsubscribe: https://lists.kamailio.org/cgi-bin/mailman/options/sr-users, mailto:sr-users-request@lists.kamailio.org?subject=unsubscribe

Have you tried this and run into a problem?

Any decent mail client will give you this and other options if you simply right-click on a list message.

Antony.