There are several reasons why character corruption might occur in email marketing:
Encoding Mismatches: Different email clients use different encodings, such as UTF-8 or ISO-8859-1. If the encoding used to send the email does not match the encoding used to display it, character corruption can occur. HTML Entities: Special characters that are not properly encoded in HTML entities can also lead to character corruption. Server Issues: Sometimes, the servers that relay the email can alter the encoding, leading to corruption.