Changelog (v5.1.3...v5.1.4)
- bug #37913 Support Return-Path in SesApiAsyncAwsTransport (cvmiert)
- bug #37900 Fixed mandrill api header structure (wulff)
- bug #37899 Support reply-to in SesApiAsyncAwsTransport (cvmiert)
- bug #37888 Reorder headers used to determine Sender (cvmiert)
- bug #37872 Fixed envelope recipients on sendgridApiTransport (arendjantetteroo)