Hi! This is more of a question rather than an issue.

I'm working on an implementation that has to send many emails using one and the same SMTP server. I saw that async sending is already supported which is pretty cool! However, I was looking for a way to send many emails synchronously over an already established TCP connection.

Browsing the MailSender code I stumbled on this part. I think this opens a new connection for each email, right? Does it make sense to improve this, so that it reuses the transport/session to send several messages synchronously?