Module id 

Message identity and threading primitives.

Structs

InReplyTo

In-Reply-To message id wrapper.

MessageId

Message-ID value rendered with angle brackets.

MessageIdDomain

Message-ID domain part.

MessageIdLocal

Message-ID local part.

References

Ordered References header values.

ThreadReference

Simple thread reference path rooted at one message id.

Enums

MessageIdError

Error returned when message identity primitives fail validation.