Changelog (v5.4.4...v5.4.5)
- bug #45338 Fix string-cast of exceptions thrown by authenticator in EsmtpTransport (wikando-ck)
- bug #45275 ensure only a single tag can be used with Postmark (kbond)
- bug #45274 allow Mailchimp to handle multiple TagHeader's (kbond)
- bug #44839 MailerInterface: failed exception contract when enabling messenger (Giorgio Premi)