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Discover the Allowed Characters for an Email Address
This guide details the allowed and valid characters when you need to create an email address (maximum of 64 characters) within an Infomaniak Mail Service.
username.mail @ domain.xyz
Some characters may be prohibited or allowed, but they are not the same characters depending on whether they appear before or after the @ symbol, as in username.mail@domain.xyz for example.
To understand the possibilities offered at the level of the domain name itself (the distinct part domain.xyz that comes after the @ symbol), read this guide.
In the part representing the user's email address (the distinct part username.mail that comes before the @ symbol), Infomaniak allows certain characters defined below.
International Standards
Providers like Infomaniak may restrict the use of certain characters when creating email addresses, although they are allowed by the RFC (Request for Comments) #5321 and #5322 in particular.
Here are the characters that may or may not be used in the part preceding the @ of an email address:
| Prohibited Characters | Only Allowed Characters |
|---|---|
the dot (.) when used as the first or last character or consecutively ("anna.alpha" is allowed but "anna..alpha" is not) | |
the at symbol (@) | letters (from A to Z) |
space ( ) | numbers (from 0 to 9) |
exclamation mark (!) | the hyphen (-) |
hash sign (#) | the underscore (_) |
dollar sign ($) | |
percent sign (%) | |
caret (^) | |
ampersand (&) | |
asterisk (*) | |
opening parenthesis (() | |
closing parenthesis ()) | |
equal sign (=) | |
opening bracket ([) | |
closing bracket (]) | |
opening angle bracket (<) | |
closing angle bracket (>) | |
comma (,) | |
quotation marks (") | |
slash (/) | |
semicolon (;) | |
question mark (?) | |
| all non-ASCII characters | |
| all non-printable characters such as those from the ASCII character set below 32 (e.g. control characters) | |