Wasserman sign in email

The Wasserman sign!

The Wasserman sign is a visual cue in an email that indicates the sender's email address is not valid or is not recognized by the recipient's email server. It's named after the company Wasserman Media Group, which was one of the first to use this technique.

Here's what the Wasserman sign looks like:

=?utf-8?q?=

This sequence of characters is usually displayed as a series of question marks or a garbled string of characters. It's often accompanied by a message saying "Invalid email address" or "Email address not recognized."

The Wasserman sign is used to indicate that the email address in the "From" field of the email is not valid or is not recognized by the recipient's email server. This can happen for a variety of reasons, such as:

1. The email address is misspelled or does not exist.
2. The email server is down or not responding.
3. The email address is blocked or blacklisted.
4. The email client or server is not configured correctly.

The Wasserman sign is not a standard email header, but it's widely recognized and used by many email clients and servers. If you see this sign in an email, it's likely that the sender's email address is not valid or is not recognized by the recipient's email server.