This option allows you to explicitly remove any mail headers from mail being distributed to the mailing list. You can also remove headers that Lyris inserts.
For example, if you do not want the "Precedence: bulk" header to be included in mail distributed to your list (Lyris adds it by default), you can enter "precedence" in the "Remove Headers" field.
If you want to remove multiple headers, you can as many as you like, by separating each header to remove with a carriage return. For example:
Precedence Lyris will search in a case-insensitive manner for the headers you specify. If any of the headers you specify to remove are found, they are automatically removed.