Incoming email and Ruby 2.5

All the servers originally build using this role ran Debian Stretch and this comes with Ruby 2.3.0, Debian Buster has 2.5.0 and it appears that the receive-mail needs updating for this version of Ruby?

May 27 05:29:06 forum receive-mail[18223]: Failed to POST the e-mail to https://forum.meet.coop/admin/email/handle_mail: Failed to open TCP connection to forum.meet.coop:443 (Connection refused - connect(2) for "forum.meet.coop" port 443) (Errno::ECONNREFUSED)
May 27 05:29:06 forum receive-mail[18223]:   /usr/lib/ruby/2.5.0/net/http.rb:939:in `rescue in block in connect'#012  /usr/lib/ruby/2.5.0/net/http.rb:936:in `block in connect'#012  /usr/lib/ruby/2.5.0/timeout.rb:93:in `block in timeout'#012  /usr/lib/ruby/2.5.0/timeout.rb:103:in `timeout'#012  /usr/lib/ruby/2.5.0/net/http.rb:935:in `connect'#012  /usr/lib/ruby/2.5.0/net/http.rb:920:in `do_start'#012  /usr/lib/ruby/2.5.0/net/http.rb:909:in `start'#012  /usr/lib/ruby/2.5.0/net/http.rb:1458:in `request'#012  /usr/local/bin/receive-mail:60:in `post_email'#012  /usr/local/bin/receive-mail:39:in `main'#012  /usr/local/bin/receive-mail:75:in `<main>'

Or perhaps I have misunderstood the problem?