Am 26.07.2014 um 15:47 schrieb Mark Martinec: > David F. Skoll wrote: >> Google must be using some secret algorithm to decide whether or not to >> be strict. > > https://support.google.com/mail/answer/81126?p=ipv6_authentication_error&rd=1#authentication > > (September 2013) > > - Sign messages with DKIM. We do not authenticate messages signed > with keys using fewer than 1024 bits. > > Additional guidelines for IPv6 > > - The sending IP must have a PTR record (i.e., a reverse DNS of the > sending IP) and it should match the IP obtained via the forward > DNS resolution of the hostname specified in the PTR record. > Otherwise, mail will be marked as spam or possibly rejected. > - The sending domain should pass either SPF check or DKIM check. > Otherwise, mail might be marked as spam.
Hi Marc, i know that, but it was reported plausible to fail with ipv6 anything setup right way sometimes. I guess google has/had "hidden" additional checks on ipv6 mail by whatever reason. Anyway most people dont forget ipv6 ptr , but fail with including ipv6 SPF, if DKIM is used it should not relate to ipv4/ipv6 transport. > > > 2014-07-25 20:05 Robert Schetterer wrote: >> its simply a bug, but they dont care, spam tagging was reported >> with all settings good ipv6 SPF/DKIM/DMARC/PTR >> however it might fixed recent or will fixed some day, i never retested >> it ,now using ipv4 transport only ,for them > > Our mail to google over IPv6 is still being accepted > (have it all: SPF/DKIM/DMARC/PTR). > > Consider enabling DMARC daily reports, google and some other > big players are sending them, can be insightful. i have DMARC since it was anounced, i dont saw very usefull report info since then, and it didnt stop bots fake our most spam loved domains after all hotmail sometimes failed total with DMARC report policy, also google sub mailsystems forwarded spam from some hacked accounts meanwhile > > Here is our DNS record: > $ host -t txt _dmarc.ijs.si > _dmarc.ijs.si "v=DMARC1\; p=none\; rua=mailto:mailauth-repo...@ijs.si"; > > Mark > Best Regards MfG Robert Schetterer -- [*] sys4 AG http://sys4.de, +49 (89) 30 90 46 64 Franziskanerstraße 15, 81669 München Sitz der Gesellschaft: München, Amtsgericht München: HRB 199263 Vorstand: Patrick Ben Koetter, Marc Schiffbauer Aufsichtsratsvorsitzender: Florian Kirstein
