hi Rob - please try using https://support.apple.com/en-us/HT204137 <https://support.apple.com/en-us/HT204137> as a POC for iCloud.
> On May 31, 2016, at 3:15 AM, Rob N ★ <[email protected]> wrote: > > We're seeing a lot of our mail being deferred due to being listed on the > Proofpoint blacklist. A typical response to MAIL FROM: > > 450 4.7.0 Deferred - see > https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.237 > <https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.237> > > The major site this is affecting delivery to is iCloud, but there are other > smaller sites in our logs, so it's not only iCloud. > > This happens from time to time, but this time Proofpoint's lookup service > says we're not being listed. We've tried cycling our outgoing IPs to > known-good ones (we monitor many blacklists), but remote sites continue to > defer our mail while the lookup service continues to say we're fine: > > https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.25 > <https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.25> > https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.26 > <https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.26> > https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.27 > <https://support.proofpoint.com/dnsbl-lookup.cgi?ip=66.111.4.27> > > (and so on. I suspect the entire 66.111.4.0/24 range would produce the same > results). > > Either we are listed, and the lookup service is wrong, or we're not listed > and whatever internal lookup Proofpoint customers use is wrong. > > We haven't been able to get hold of anyone at Proofpoint - no obvious support > service for non-customers and we haven't been able to get anyone on the > phone. Does anyone have a contact they can put me in touch with? > > Cheers, > Rob N > FastMail Operations. > _______________________________________________ > mailop mailing list > [email protected] > https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
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