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10.3 Server: Create a postfix catch-all email account
Authored by: mcroft on Nov 12, '03 02:09:52PM

A 'catchall' account is considered harmful by many mailadmins. You should think carefully before doing this, and probably research the topic on some web sites. In addition to violating the RFCs, it's not helpful to the people trying to send you mail.



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10.3 Server: Create a postfix catch-all email account
Authored by: lipids on Nov 12, '03 02:52:21PM

How is it "not helpful" to people trying to send you mail?



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10.3 Server: Create a postfix catch-all email account
Authored by: mcroft on Nov 12, '03 11:30:37PM

in the same way that Verisign's wildcard domain resolution is not helpful. It doesn't bounce properly. In this case, it (generally) relies on human re-routing.

Like I said, search the web before you implement this. There are plenty of screeds out there from people who feel more strongly about it than I do.

Even if you decide to implement a catch-all, it's worthwhile to know that some people consider it a harmful mail administration technique. You can't make an informed decision about it unless you know that there are reasons not to do so.



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10.3 Server: Create a postfix catch-all email account
Authored by: RandyMan on Nov 13, '03 10:55:20AM

I find it an EXTREMELY useful feature; although I've not moved over to PostFix yet, I'm running EIMS, and have it set to forward messages sent to unknown users to my normal account.

What this allows me to do is hand out address willy-nilly to all those Internet commerce sites that require an email address. I use "site.name@my.domain" (for example, amazon.com@my_domain.com) as the address they require. I still get the mail, and if they've lied about their privacy policy, and I start getting spam to that address, I know *EXACTLY* whose fault it is. At that point, I explicitly disable that account, and the spam bounces appropriately, and that company loses what could have been a very loyal customer.



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10.3 Server: Create a postfix catch-all email account
Authored by: searcher on Nov 13, '03 05:33:30PM

I agree w/ mcroft on this. If anyone chooses to use this catchall email go for it, it's your domain and mailserver. Choice is what makes the 'Net great. I find it to be a PITA though.

Not only does it breed inaccuracy, like mentioned above, but it also allows more spam in. Since the domain will accept mail to <anything>@domain.com, spam will definately increase. Compare the amount of messages rejected for "User unknown" w/ and w/out the catchall.



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