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