Confirmation email on homework submission

[alexeygrigorev]

Could a confirmation email get send when submitting the homework?

As discussed in the following Slack thread: https://datatalks-club.slack.com/archives/C01FABYF2RG/p1706036081478959

An additional benefit from a confirmation mail could be that participants will have less questions how they know if there homework was submitted successfully.

(Initially opened in https://github.com/DataTalksClub/data-engineering-zoomcamp/issues/440)

[alexeygrigorev]

Might be quite difficult to implement now because gmail requires to have "unsubscribe" link in all mass emails, or they will ban our email address. Implementing "unsubscribe" functionality might require too much effort.