Email Address Validation

General Information

Mapp Engage uses email addresses as the primary identifier for contacts. When you import or add contacts, Mapp Engage checks each email address to ensure it meets specific requirements. Messages sent to invalid addresses are automatically blocked by ISPs, which can harm your reputation as a marketer.

To maintain compliance, Mapp Engage verifies that each email address adheres to the following criteria:

1. Valid Characters:

   • The local part (before the @ sign) can include letters, numbers, and certain special characters. The following special characters are allowed in the local part: !#$%&'*+/=?^_{|}~`.

   • The domain part (after the @ sign) can include letters, numbers, and special characters. Additionally, it may contain letters with diacritical marks and the sharp S character (ß), which Mapp Engage encodes and stores using Punycode. However, these special characters are not allowed in the local part.

2. Dot Usage:

   • Dots are permitted in the local part of the address but must not appear at the beginning or end. Additionally, consecutive dots (e.g., ..) are not allowed.

3. Length Restrictions:

   • The domain part of the address cannot exceed 63 characters.

   • The entire email address must not exceed 129 characters.

Mapp Engage uses a regular expression to validate the syntax of each email address. If an address does not conform to this pattern, it will not be stored in the system.

Address Examples

Valid

Invalid