https://userinfo.rahul.net/and following the link entitled "Email Address and SMTP Filtering Control".
If you have a custom domain, you can add arbitrary email addresses in your
domain. An email address may forward to any other email address on the
Internet. To simply cause an email address to forward to your mail account,
specify your username as the destination. Here are some examples:
joe@example.com => joe sales@example.com => mysalesguy@remotelocation.com accounting@example.com => joeIf you do not have a custom domain, you can still forward mail for any hyphenated suffix of your email address. (See also:
joeuser@rahul.net => joeuser joeuser-school@rahul.net => myothermailbox@elsewhere.net joeuser-office@rahul.net => joeuserYou can also cause mail arriving for an email address to be rejected, by forwarding that email address to the special token "fail". This may optionally be followed by a colon and an error message. The sender of the failed email will see the error message when his mail fails. Examples are below.
sue@example.com => fail joe@example.com => fail:Joe is no longer here bill@example.com => fail:Bill has moved to bill@elsewhere.net joeuser@example.com => joe@someotherdomain.net joeuser-school@example.com => fail:I am no longer in schoolWhen incoming mail is rejected due to the use of the "fail" token as above, our network refuses to accept the message, by returning an SMTP error code during the SMTP transaction. No bounce message is sent back, since the original incoming message is never accepted in the first place.
joeuser-office@rahul.net => fail:I no longer have an office joeuser-school@rahul.net => fail:Joe is no longer in school joeuser-xxx@rahul.net => fail:No such person
This document is: http://faq.rahul.net/cgi-bin/fom.cgi?file=39
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