![]() The restrictions for special characters are that they must only be used when contained between quotation marks, and that 3 of them (The Special characters are allowed with restrictions.Provided also that it does not appear two or more times consecutively (e.g. (dot, period, full stop) (ASCII: 46) provided that it is not the first or last character, and Uppercase and lowercase English letters (a–z, A–Z) (ASCII: 65-90, 97-122).The local-part of the email address may use any of these The formal definitions are in RFC 5322 (sections 3.2.3Īnd 3.4.1) and RFC 5321 - with a more readable form given in Maximum of 253 characters - but the maximum 256 characters length of a forward or reverse path restricts the entire email address to be no more than 254 characters. Hi The format of email addresses where the local-part may be up to 64 characters long and the ![]()
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