jodd-mail/src/main/java/jodd/mail/CommonEmail.java
public T header(final String name, final String value) {
		headers.put(name, value);
		return _this();
	}
public T header(final String name, final String value) {
		headers.put(name, value);
		return _this();
	}
Sets header value.

@param name  The name of the header.
@param value The value of the header.
@return this