Postmark has released several new features to make its service more user-friendly, including full support for emoji characters in messages and improved internationalization support. The company added a new field to the Inbound webhook payload to help distinguish between multiple recipients on the same message, allowing users to identify which address each webhook call is for. Additionally, Postmark has made several fixes for internationalization support, improving its handling of character sets such as KOI8-R and ISO-8859-1, with these improvements applying to both Inbound and Outbound SMTP services.