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Discover the characters allowed for an email address
This guide details the characters allowed and valid when you need to create an email address (of 64 (maximum characters) within a Mail Service Infomaniak.
Preamble
- Some characters may be prohibited or allowed, but these are not the same characters depending on whether they are before or after the arobase @, as in nom-utilisateur.mail@nom-domaine.xyz e.g.
- To understand the opportunities at the level of the domain name itself (separate part)
nom-domaine.xyzWho's coming after arobase @) , be aware of this other guide.
- To understand the opportunities at the level of the domain name itself (separate part)
mail-username @ domain-name.xyz
In the part representing the user's email address (separate part) nom-utilisateur.mail Who's coming before arobase @) providers such as Infomaniak can limit the use of certain characters when creating email addresses yet admitted by the RFC (Request for Comments) #5321 and #5322 in particular.
Here is what may or may not be used in the part preceding the arobase of an email address:
| characters not allowed | only characters allowed |
|---|---|
point (.) when used as first or last character or consecutively ("anna.alpha" is allowed but "anna..alpha" is not) | |
arobase (@) | letters (of A to Z) |
space ( ) | the figures (of 0 to 9) |
the exclamation point (!) | the indent (-) |
the hase sign (#) | the bottom dash or underscore (_) |
the dollar ($) | |
the percentage (%) | |
the caret (^) | |
the sparrow's eyebrow (&) | |
asterisk (*) | |
the opening parenthesis (( ) | |
the closing parenthesis ( )) | |
the equal sign (=) | |
the opening hook ([) | |
the closing hook (]) | |
the opening chevron (<) | |
the closing chevron (>) | |
comma (,) | |
quotation marks (") | |
the slash (/) | |
the semicolon (;) | |
the question mark (?) | |
| all non-ASCII characters | |
| any non-printable characters such as those in the ASCII character set below 32 (e.g. control characters) | |
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