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Old 5 Dec 2019, 05:54 PM   #11
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Join Date: Dec 2017
Location: Scotland
Posts: 314
Originally Posted by rmmarsh View Post
What I want to accomplish is when a person tries to respond to the email I have sent them, I want the Fastmail Sieve code to reject their reply with a custom message other than "550 No Such User Here".

I am waiting for the webmaster of the target email system to create the email address "do-not-reply..." which I think will solve the problem. I will get back to this forum as soon as he creates the email address (his wife is in the hospital right now, so I told him "family comes first" and I can wait.

Thanks everybody for the comments; I'm sure it will be resolved relatively soon.

Why does the webmaster of the target email system have to create something? And is that "do-not-reply..." meant to be [email protected]in?

If the do-not-reply... address IS @target.domain then anyone who does create a reply will send it to the target.domain and you'll never see it so your Sieve code at Fastmail is irrelevant.

More to the point though if your original outbound email is From: your address and a reply is sent back to your address, we're not in 550 territory.

On the other hand if your original mail leaves with a Reply-To address set to [email protected]in then a reply sent to that address either gets to you (because [email protected]in IS an address you've set up), or doesn't (if you haven't created it). Or, if FM are hosting your entire domain for you, it presumably will get here... and again there's no 550.

I think you need to be clearer about what's going on.
- are you using generic FM domains, or are FM hosting your domain?
- what are you expecting the webmaster at the target site to do?

You are never going to be able to stop someone from sending a reply either to your reply's From address or to its Reply-To address (if you set one) though.

Your short example of Sieve code did not show it, but I'm wondering how you're planning to tell that an incoming mail (a) has an attachment, (b) that it's the kind that matters - 'an article', and (c) that it is arriving as a reply to an earlier message of yours and isn't a 'new' mail in the way you advise such users to send things to you?
JeremyNicoll is offline   Reply With Quote