Thanks for your advice, that makes me clear.
> On Mon, Oct 18, 2021 at 09:45:49PM +0800, Henrik Peng wrote: > > > I have a domain in registrar saying it’s foo.com. > > Registrar has the email forwarding feature, so u...@foo.com will be > > forwarded to my gmail. > > > > I am not sure that, the registrar will forward email based on message > > header address or RCPT TO address? > > If your email hosting operator determines which recipient rules to apply > via something other than the envelope recipient (RCPT TO) address(es), > move your domain to a competent hosting operator. > > There is only one correct way to determine the recipient addresses of > a message, and that's the message envelope. > > -- > Viktor. >
