Re: [mailop] Delivery issue at Yahoo
Am 07.11.2017 um 16:18 schrieb Jan Schapmans: > We tried reaching out to yahoo but no response yet. > > We tried lowering some settings like emails/minute & max connections. I guess > we just have to wait if this has any positive impact. Any news? Did you see any impact. We're seeing very similar patterns here and while Yahoo accepts most of our messages these rejections are a bit annoying. It seems like the block seems to be account-specific not so much about IPs in general. Maybe Yahoo started to use user-specific spam preferences during the SMTP dialog? regards, Felix ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] Delivery issue at Yahoo
Am 07.11.2017 um 16:18 schrieb Jan Schapmans: > Is anybody seeing this issue as well because since last night we are also > seeing a lot of those messages and it’s happening on all our ip’s, all > customers, … ? > > “554 delivery error: dd Requested mail action aborted - > mta1010.mail.gq1.yahoo.com“ Yes, we are seeing a couple of those here as well (though most of our messages are accepted). I don't have any insights (right now) if our click rates are affected. regards, Felix ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] iCloud "Message rejected due to local policy"
Am 02.11.2017 um 16:48 schrieb Chris Nagele: > Hi all. Does anyone have experience dealing with the SMTP response > "550 5.7.1 Message rejected due to local policy" from iCloud / Apple? Probably not so helpful but we saw similar issues in the past. I contacted icloudad...@apple.com then but usually we were able to send before they got back to us. For it only affected some recipients even though all messages were sent from the same domain/IP. Felix ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] About the Certified Senders Alliance
Am 02.11.2017 um 15:53 schrieb Alexander Zeh: > Regarding our header: I'm sure you're talking about the X-CSA-Complaints > header. Of course the header is not used by ISPs or technology partners to > identify whitelisted emails. We operate an IP-based whitelist for that. Is there any public information about how to query that whitelist? I didn't find any information about the whitelist on your website. (Also I just checked our mail stats and kicked a few abuse reports with fresh "CSA" spam. The kajomi guys still seem to have some "quality" issues.) Felix Schwarz ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] btinternet.com blacklist
Am 13.07.2017 um 04:23 schrieb Jay Hennigan: > If you live in a crime-ridden neighborhood by misfortune or choice, you learn > not to leave valuable outgoing packages in your curbside mailbox for the > postman to pick up. You take them to a secure facility operated by someone you > trust. Same principle applies digitally. Just to put this into perspective: I don't think the Hetzner situation is that dire overall: I just checked the Talos/SenderBase scoring for some Hetzner nets and they were not so bad. For example the top 50 ips from 78.47.0.0/16 (by email volume) there were 34 IPs with "good" reputation and 7 with "bad" reputation. I am sure my customers would not tolerate blocking networks with similar statistics. Personally if I expect sophisticated measures from dc providers (SMTP proxies, even forcibly terminating TLS connections) I also try to do something more sophisticated when it comes to classifying received messages. (E.g. we are building our own internal IP reputation so initially unknown IPs might get a bad rating from the network but these messages still have a chance and over time the IP might get its own reputation so it will be unaffected from the general network storage.) Anyhow I'll stop here as I feel I'm off-topic now :-) regards Felix ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] hetzner and the btinternet.com blacklist
Hi guys, thank you very much for all the input. Seems like SMTP proxies/smarthosts + port 25 blocks/connection counting might be good for something. However I really hope that breaking up TLS connections will never get a routine practice. I mean we are fighting this for years now with all these shitty snake-oil "security" appliances – and I'm not keen of seeing this malpractice more widespread. Brandon also mentioned clickbots/fraud farming. So that means a good dc provider should also try to prevent/detect that? Do these activities influence email deliverability as well? Or is that a separate bucket only used to detect ad fraud? What is "state of the art" when it comes to preventing these clickbots etc from a dc provider perspective? regards, Felix ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] btinternet.com blacklist
Am 10.07.2017 um 21:45 schrieb John Levine: > Many other hosting companies manage to control their spam. The usual > approach is to filter the mail their customers send, either with > "transparent" filters hijacking port 25 traffic From your experience: Are spammers relying on unencrypted SMTP? I just checked and most of our outbound SMTP deliveries are using TLS. > or by blocking port 25 and providing a smarthost. That might work - at least if server got hacked. > I suppose they might claim that under German law they're not allowed to do > that, but for one thing, that's not our problem, and for another, > Schlund/1&1 manages to deal with it. Ok, maybe I'm just unlucky but I get quite a bit of spam via their relay servers. If I'm not mistaken also Hetzner's mail admins are reading this list so maybe they can convice their management to do something about the bad reputation. regards, Felix ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
Re: [mailop] Mails to microsoft
Am 15.02.2017 um 17:08 schrieb Laura Atkins: > If Hertzner cared they could sign up for the MS SNDS program and see a list of > all the IPs that were currently blocked. They do that already (as Hetzner customers can see when registering a Hetzner IP in SNDS). AFAIK they also monitor IP blacklists for their IP range. One thing I'm wondering: If deliverability with Hetzner is already bad is there any chance to deliver anything at all from a OVH/DigitalOcean/AWS ip? (just to get a sense of how problematic Hetzner is) Felix ___ mailop mailing list mailop@mailop.org https://chilli.nosignal.org/cgi-bin/mailman/listinfo/mailop
