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Port 44
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Service
mpm-flags
Protocol
TCP
Status
🪦 Obsolete — no longer in active use
Description
MPM FLAGS options field — part of the Message Processing Module, an early ARPANET-era mail relay protocol. Superseded by SMTP.
RFC
RFC 759
—
Internet Message Protocol
Citations
IANA registry
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5000-5100
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Protocol(s)
TCP
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