OptionalAttachmentsAttachments
OptionalBccBcc recipients email addresses only
OptionalCcCC recipients
Sender address
OptionalHeadersOptional message headers
Header in key value
OptionalHTMLMessage body (HTML)
OptionalReplyOptional Reply-To recipients
OptionalSubjectEmail message subject
OptionalTagsMailpit tags
OptionalTextMessage body (text)
To recipients
Request parameters for the sendMessage() API.