Re: [exim-dev] DMARC ARC
On 11/10/16 17:41, Jeremy Harris wrote: > On 11/10/16 10:24, Jeremy Harris wrote: >> On 10/10/16 16:27, Peter Gervai wrote: >>> https://tools.ietf.org/html/draft-ietf-dmarc-arc-protocol-00 >>> >>> Kind of signed "received" lines. It's implemented in GMail and AOL >>> test environments. Looks useful for trusted path checking. >> >> It's more of a mmailinglist-software thing than an MTA thing, >> I think. > > I'll modify that. It's a mailinglist thing as regards generation; > but the final receiving MTA wants a checking implementation. > > The latter is where Exim might want to provide support. I started work on an implementation. Anyone out there interested in testing interoperability? Please contact me. -- Cheers, Jeremy -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
Re: [exim-dev] DMARC ARC
On 18/10/2016 16:17, Jeremy Harris wrote: > On 18/10/16 15:11, Andrew C Aitchison wrote: >> On Tue, 11 Oct 2016, Jeremy Harris wrote: >>> I'll modify that. It's a mailinglist thing as regards generation; >> >> Does "mailinglist" include forwarding ? > > No. > >> If so exim might want to generate too. >> >>> but the final receiving MTA wants a checking implementation. >>> >>> The latter is where Exim might want to provide support. >> >> Is ARC an all or nothing, or is it a scoring thing >> that could be done by spamassassin ? > > AFAIR it's a one-bit result - but you could obviously > feed that one bit into SA. JFYI, I plan to play with ARC implementation in Rspamd soon, so if you are interested, I can send you a notice when it is ready. I'm sorry for off-topic for this list. -- Vsevolod Stakhov -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
Re: [exim-dev] DMARC ARC
On Tue, 11 Oct 2016, Jeremy Harris wrote: On 11/10/16 10:24, Jeremy Harris wrote: > On 10/10/16 16:27, Peter Gervai wrote: >> https://tools.ietf.org/html/draft-ietf-dmarc-arc-protocol-00 >> >> Kind of signed "received" lines. It's implemented in GMail and AOL >> test environments. Looks useful for trusted path checking. > > It's more of a mmailinglist-software thing than an MTA thing, > I think. I'll modify that. It's a mailinglist thing as regards generation; Does "mailinglist" include forwarding ? If so exim might want to generate too. but the final receiving MTA wants a checking implementation. The latter is where Exim might want to provide support. Is ARC an all or nothing, or is it a scoring thing that could be done by spamassassin ? I note that section 10 warns that ARC could be mis-used to force the checking server to make many DNS requests. Perhaps a configurable limit should be included in the implementation ? -- Andrew C Aitchison -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
Re: [exim-dev] DMARC ARC
On 18/10/16 15:11, Andrew C Aitchison wrote: > On Tue, 11 Oct 2016, Jeremy Harris wrote: >> I'll modify that. It's a mailinglist thing as regards generation; > > Does "mailinglist" include forwarding ? No. > If so exim might want to generate too. > >> but the final receiving MTA wants a checking implementation. >> >> The latter is where Exim might want to provide support. > > Is ARC an all or nothing, or is it a scoring thing > that could be done by spamassassin ? AFAIR it's a one-bit result - but you could obviously feed that one bit into SA. > I note that section 10 warns that ARC could be mis-used > to force the checking server to make many DNS requests. > Perhaps a configurable limit should be included in the > implementation ? Entirely possibly - but for the avoidance of doubt I'm not planning an implementation at present myself. -- Cheers, Jeremy -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
Re: [exim-dev] DMARC ARC
On 11/10/16 10:24, Jeremy Harris wrote: > On 10/10/16 16:27, Peter Gervai wrote: >> https://tools.ietf.org/html/draft-ietf-dmarc-arc-protocol-00 >> >> Kind of signed "received" lines. It's implemented in GMail and AOL >> test environments. Looks useful for trusted path checking. > > It's more of a mmailinglist-software thing than an MTA thing, > I think. I'll modify that. It's a mailinglist thing as regards generation; but the final receiving MTA wants a checking implementation. The latter is where Exim might want to provide support. -- Cheers, Jeremy -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
Re: [exim-dev] DMARC ARC
On 10/10/16 16:27, Peter Gervai wrote: > https://tools.ietf.org/html/draft-ietf-dmarc-arc-protocol-00 > > Kind of signed "received" lines. It's implemented in GMail and AOL > test environments. Looks useful for trusted path checking. It's more of a mmailinglist-software thing than an MTA thing, I think. -- Cheers, Jeremy -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
[exim-dev] DMARC ARC
Hello, Just a sidenote: https://tools.ietf.org/html/draft-ietf-dmarc-arc-protocol-00 Kind of signed "received" lines. It's implemented in GMail and AOL test environments. Looks useful for trusted path checking. g -- ## List details at https://lists.exim.org/mailman/listinfo/exim-dev Exim details at http://www.exim.org/ ##
