jodd-mail/src/main/java/jodd/mail/EmailFilter.java
public EmailFilter subject(final String subject) {
		final SearchTerm subjectTerm = new SubjectTerm(subject);
		concat(subjectTerm);
		return this;
	}
public EmailFilter subject(final String subject) {
		final SearchTerm subjectTerm = new SubjectTerm(subject);
		concat(subjectTerm);
		return this;
	}
public EmailFilter subject ( final String subject ) { final SearchTerm subjectTerm = new SubjectTerm ( subject ) ; concat ( subjectTerm ) ; return this ; }
Defines filter for SUBJECT field.

@param subject The SUBJECT.
@return this
Defines filter for SUBJECT field .