Different IP isn't necessarily sufficient, ie if you sign both marketing and transactional with the same dkim domain, we are building a single reputation for that domain.
Which somewhat answers Doug's question, sure, using different domains may mean different reputation and handling, which may be more or less important if some internal ADMDs have different spamminess. We've mostly used different sub-domains when we want to be harsher for phishing purposes, but we've always had them match the from address in that case (ie, From: [email protected] is signed with accounts.google.com). Brandon On Wed, Feb 10, 2016 at 10:03 AM, Michael Peddemors <[email protected]> wrote: > It is a lot simpler to simply use a different originating IP Address, > based on whether it is marketing vs transactional, I don't believe anyone > should mix those two... > > > On 16-02-10 09:45 AM, Doug Brenner wrote: > >> RFC 5863 section 2.3, "Choosing the Signing Domain Name", discusses >> using multiple domains to separate different email streams, e.g., >> marketing vs. transactional. >> >> I'm curious about experiences of doing this when the RFC5822.From >> and/or RFC5821.From domain(s) are the parent. >> >> For example, say I send email with header, >> >> From: [email protected] >> >> and DKIM sign with d=bulk.example.com. >> >> I know the DKIM RFC says the "signing identity specified by the DKIM >> signature is not required to match an address in any particular header >> field", however, it's really up the recipients in the end. >> >> Is anyone doing this to separate email streams and create different >> DKIM domain reputations? >> >> What "real-world" impact does it have when the header domain and DKIM >> domain don't match? (In particular, when the header domain is the >> parent as above.) >> >> Is it worth the effort to setup this type of environment instead of >> just putting everything under the example.com domain? >> >> I'm sure some sites are dealing with this by changing the From address >> to use a matching DKIM domain, but when you're dealing with a >> university where everyone wants to use the parent, sub-domains are >> likely to happen. >> >> If you can point me to resources or a better discussion list, that's >> fine too. Thanks. >> -- >> Doug Brenner, UNIX System Administrator >> Information Technology Services, The University of Iowa >> +1 319 467 1625 / [email protected] / [email protected] >> >> _______________________________________________ >> mailop mailing list >> [email protected] >> https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >> >> > > > -- > "Catch the Magic of Linux..." > ------------------------------------------------------------------------ > Michael Peddemors, President/CEO LinuxMagic Inc. > Visit us at http://www.linuxmagic.com @linuxmagic > ------------------------------------------------------------------------ > A Wizard IT Company - For More Info http://www.wizard.ca > "LinuxMagic" a Registered TradeMark of Wizard Tower TechnoServices Ltd. > ------------------------------------------------------------------------ > 604-682-0300 Beautiful British Columbia, Canada > > This email and any electronic data contained are confidential and intended > solely for the use of the individual or entity to which they are addressed. > Please note that any views or opinions presented in this email are solely > those of the author and are not intended to represent those of the company. > > > _______________________________________________ > mailop mailing list > [email protected] > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop >
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