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RFC 5321 » History » Version 2

Vyacheslav Mukhortov, 2025-12-03 21:23

1 2 Vyacheslav Mukhortov
*RFC 5321* - https://datatracker.ietf.org/doc/html/rfc5321 p. 4.5.3.1.1-4.5.3.1.3
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see also: https://datatracker.ietf.org/doc/html/rfc5322 p. 3.4.1.
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<pre>
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4.5.3.1.1.  Local-part
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   The maximum total length of a user name or other local-part is 64
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   octets.
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4.5.3.1.2.  Domain
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   The maximum total length of a domain name or number is 255 octets.
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4.5.3.1.3.  Path
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   The maximum total length of a reverse-path or forward-path is 256
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   octets (including the punctuation and element separators).
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</pre>