[HECnet] Mailman Question When Using a Forwarding Service

Hello Everyone, Are there any Mailman experts here? The way I use my email addresses is that I have an email address provided by my ISP (Robert.jarratt(a)ntlworld.com <mailto:Robert.jarratt@ntlworld.com> ), but I use an email forwarding service to forward rob(a)jarratt.me.uk <mailto:rob@jarratt.me.uk> to my ISP mailbox. This means that I can receive email sent to rob(a)jarratt.me.uk <mailto:rob@jarratt.me.uk> , but any email I send comes from Robert.jarratt(a)ntlworld.com <mailto:Robert.jarratt@ntlworld.com> . I do put rob(a)jarratt.me.uk <mailto:rob@jarratt.me.uk> in the reply-to. Can Mailman be configured to accept emails from my outbound address, but send them to my forwarding address? I would like to do this for my subscription to the HECnet list, if possible. If I can't then so be it, but I thought it worth asking. Thanks Rob