Symfony version(s) affected

7.2, 7.3

Description

With symfony/mailer-send-mailer installed, wWhen I use this DSN:
mailersend+smtp://USERNAME:PASSWORD@default
I get this exception:
Connection could not be established with host "ssl://smtp.mailersend.net:587": stream_socket_client(): SSL operation failed with code 1. OpenSSL Error messages: error:0A00010B:SSL routines::wrong version number

If I use this DSN, however:
smtp://USERNAME:PASSWORD@smtp.mailersend.net:587
Connection is established and message is sent.

How to reproduce

Install transport. Try sending.

Possible Solution

Hopefully those who understand what's going on under the hood better than I do can figure out from the working generic transport DSN and the error message why the supplied transport does not work.

Additional Context

No response