Re: Mailing lists - assumptions
Alessandro Vesely <[email protected]> Sun, 20 Apr 2014 11:39:42 +0200
| Newsgroups | gmane.ietf.rfc822 |
|---|---|
| Message-ID | <[email protected]> |
On Sat 19/Apr/2014 17:57:24 +0200 Theodore Ts'o wrote: > On Sat, Apr 19, 2014 at 11:49:06AM +0200, Alessandro Vesely wrote: >> >>> From: user+originatingdomain.example.com@dmark-remediation.mailing-list.org >>> >>> .... where dmark-remediation.mailing-list.org is an MX record to an >>> automated bounce server that will explain to the user that they need >>> to really send their e-mail to [email protected] via >>> a 550 error. >> >> Oh well, it is easier, clearer, and safer to have >> >> From: [email protected] >> >> and let submission servers issue that 550 directly. > > The problem is that there might be some receiving servers that will > try to see if the originatingdomain.example.com.INVALID is a valid > domain address, and seeing that it isn't, might reject the e-mail on > that basis. Exactly. Why is that a problem? Upon rejection the user will notice the ".INVALID" and remove it, just like he or she would have done if the rejection had arrived from dmarc-remediation. The latter could have contained a pointer to an explanation page, which interested users may also find with google. Ale _______________________________________________ ietf-822 mailing list [email protected] https://www.ietf.org/mailman/listinfo/ietf-822