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by Joker_vD
9 days ago
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I've actually looked at RFC 1034 ยง 3 you've mentioned in another comment, and it states To simplify implementations, the total number of octets that represent a
domain name (i.e., the sum of all label octets and label lengths) is
limited to 255.
Which, AIUI, corresponds to maximum of 253 ASCII characters (including dots) in the common "subdomain.domain.tld" string format. So "\.{1,100}@\.{1,253}" it is (because, again, it's probably very likely that I wouldn't want to interact in the first place with people who think that the local part of their e-mail having more than a hundred characters is reasonable). |
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