Swiftmailer: Connection could not be established with host smtp.gmail.com [Connection timed out #110]

Question

I\'m posting because I\'ve already gone through the solutions posted in other questions on here but they haven\'t helped.

What I am trying to do is send email using

Answer 1

I have posted a workaround solution in Swiftmailer Gmail Connection timed out #110 where you can either use IPv4 or IPv6.

Answer 2

I've just had this issue and after immense search for the solution, it was all a matter of a security setting with my host (In this case Scaleway). I had to open security settings and enable outgoing SMTP.