Some characters are not allowed in folders, databases, queries, emails, or email template names.

Only spaces, single quote, and the following characters are allowed:

A-Z, a-z, 0-9, # - _ ( ) .

Characters not allowed:

" * / : < > ? \ |

Valid characters in email addresses

Some email addresses are considered invalid and are either not allowed to be imported into Acoustic Campaign or, if imported, will not be sent to.

There are a number of official specifications that are very broad in what is acceptable, but it mostly comes down to what an ISP will allow. Acoustic Campaign supports the majority of email addresses, but does not support every possible email address.

General description of what emails are valid:

username@domain

• The at sign ('@') must be present and not first or last character.
• The length of the name can have up to and including 64 characters.
• The length of the domain can have up to and including 64 characters.
• All email addresses are forced to lowercase when the email is sent. Therefore any email addresses requiring uppercase will most likely not be delivered correctly by the ISP as we will have changed it to lowercase.

username

Can contain:

• A-Z
• a-z
• 0-9
• ! # $ % ∓ * + - . = ? ~ | ` _ ^

The entire name can be surrounded by double quotes (though this is not supported by many ISPs). In this case, the following additional characters are allowed between the quotes - ( ) { } < > @ , ; : [ ] (space)

domain

Can contain:

• A-Z
• a-z
• 0-9
• -
• Cannot contain 2 or more consecutive periods
• Must contain at least 1 period
• Domain - Cannot begin or end with a period or dash
• The domain portion cannot be an IP address