Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redirects

John Levine <johnl@taugh.com> Fri, 10 July 2020 04:30 UTC

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From: "John Levine" <johnl@taugh.com>
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Subject: Re: [ietf-smtp] Fwd: [dispatch] Forced SMTP redirects
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In article <CAKFo7w=MJBt0FdnCcOZCXZWdkd6Jinv4TqwdpefdoaCncbZH3Q@mail.gmail.com> you write:
>PS: There have been some attempts at setting up change-of-address
>services where you can register old and new addresses, so mail servers
>could query them after getting a 550, and they never went anywhere either.
>
>See US Patents 6,654,789, 6,892,222, and 7,080,122.

By the way, 6,654,789 expires a week from Monday and 6,892,222 expired
last year so if you find any good ideas in them, you can use them.

7,080,122 doesn't expire until 2023.

R's,
John