jodd-mail/src/main/java/jodd/mail/EMLProperties.java
public T set(final Properties properties) throws MailException {
		checkSessionNotSet();
		this.properties.putAll(properties);
		return _this();
	}
public T set(final Properties properties) throws MailException {
		checkSessionNotSet();
		this.properties.putAll(properties);
		return _this();
	}
Copies properties from given set. If {@link Session} is already created, exception will be thrown.

@param properties {@link Properties} to set.
@return this
@throws MailException if the {@link Properties} has already been set.