bump mail

Gemfile

@@ -39,9 +39,7 @@ gem 'responders', '~> 3.0'
 
 gem 'ffi', '~> 1.15'
 
-# Lock mail at 2.7 due to incompatibility
-# TODO: Remove it once the new version is fixed
-gem 'mail', '~> 2.7.1'
+gem 'mail', '~> 2.8.0'
 
 gem 'rdoc', '>= 2.4.2'
 

Gemfile.lock

@@ -611,8 +611,11 @@ GEM
     loofah (2.19.1)
       crass (~> 1.0.2)
       nokogiri (>= 1.5.9)
-    mail (2.7.1)
+    mail (2.8.0.1)
       mini_mime (>= 0.1.1)
+      net-imap
+      net-pop
+      net-smtp
     marcel (1.0.2)
     matrix (0.4.2)
     messagebird-rest (1.4.2)
@@ -1057,7 +1060,7 @@ DEPENDENCIES
   listen (~> 3.8.0)
   livingstyleguide (~> 2.1.0)
   lograge (~> 0.12.0)
-  mail (~> 2.7.1)
+  mail (~> 2.8.0)
   matrix (~> 0.4.2)
   meta-tags (~> 2.18.0)
   mini_magick (~> 4.12.0)