09e5a1cf7e
Fixes https://github.com/spring-projects/spring-integration/issues/3560 According RFC 5322 `FROM` and `REPLY-TO` received mail message can be as an array of addresses. * Fix `MailUtils` to present those arrays as comma-delimited strings for Spring message headers * Fix tests to deal already with several addresses for `FROM` mime header. In the future we may change the logic to map those mime headers to arrays as it states according the mentioned RFC **Cherry-pick to `5.4.x` & `5.3.x`**
Spring Integration 
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