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--header "Message-ID: <xx@xx>" will cause the SMTP protocol to send data with two Message-Id mime header. #101

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cod1ingcoding opened this issue Jun 9, 2024 · 0 comments
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--header "Message-ID: <xx@xx>" will cause the SMTP protocol to send data with two Message-Id mime header.

Message-ID: <xx@xx>
Message-Id: <yy@yy>

However, according to RFC 5322, MIME headers in emails are case-insensitive.

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