I want outgoing emails to show my generic email forwarding address and not my ISP-given account address. Is that possible? I know I can do a one-off on a mail by mail basis but I want to change the default for all mails.

I changed the 'reply-to' address but emails i send out are still received showing as from my account address and not my generic address.

I want everyone to see and use my generic address so I can change email accounts and ISPs without any hassle.

Thanks!