Simple lightweight mail library which allows you to send and retrieve emails, and get more details about email sending and delivery
added option to auto validate postmark API responses, whether they are successfull
Sending by SMP returned default Mail gem response up until now (which is Mail message). From now on you can get back smtp response too (default will be like before).
New features:
Senders username might not match from address, due that reason, delay notification now require setting up from address.