add net-smtp

Gemfile

@@ -55,6 +55,7 @@ gem 'listen' # Required by ActiveSupport::EventedFileUpdateChecker
 gem 'lograge'
 gem 'logstash-event'
 gem 'mailjet', require: false
+gem 'net-smtp', require: false # See https://github.com/mikel/mail/pull/1439
 gem 'openid_connect'
 gem 'pg'
 gem 'phonelib'

Gemfile.lock

@@ -355,6 +355,7 @@ GEM
       ruby-vips (>= 2.0.17, < 3)
     invisible_captcha (2.0.0)
       rails (>= 5.0)
+    io-wait (0.2.0)
     ipaddress (0.8.3)
     jquery-rails (4.4.0)
       rails-dom-testing (>= 1, < 3)
@@ -429,6 +430,11 @@ GEM
     multipart-post (2.1.1)
     mustermann (1.1.1)
       ruby2_keywords (~> 0.0.1)
+    net-protocol (0.1.1)
+      io-wait
+      timeout
+    net-smtp (0.2.1)
+      net-protocol
     netrc (0.11.0)
     nio4r (2.5.8)
     nokogiri (1.13.4)
@@ -705,6 +711,7 @@ GEM
     thread_safe (0.3.6)
     tilt (2.0.10)
     timecop (0.9.4)
+    timeout (0.1.1)
     ttfunk (1.7.0)
     typhoeus (1.4.0)
       ethon (>= 0.9.0)
@@ -836,6 +843,7 @@ DEPENDENCIES
   logstash-event
   mailjet
   mina
+  net-smtp
   openid_connect
   pg
   phonelib