4 ms·

Point 1: spf, dkim, dmarc is enough to get yourself neutral with gmail. You have to do it from get-go tho, before you tarnish your reputation. Being in DNSBL li

by arpa 8y ago

Point 1: spf, dkim, dmarc is enough to get yourself neutral with gmail. You have to do it from get-go tho, before you tarnish your reputation. Being in DNSBL lists does not help either. Set up proper reverse dns entries also. Tls is completely optional. Haven't had any trouble neither with gmail nor ms using both residential and datacenter ips in two EU countries. I don't consider myself a hardcore linux admin specialising in mail, so there's that. As far as the second point, about forwarding spam goes, you're running a mailserver without spamassasin? What is this, the 1990s?

CyberShadow 8y ago
> you're running a mailserver without spamassasin? What is this, the 1990s? More like, relying on SpamAssassin to reliably and correctly classify spam is the anachronism here. Even if SpamAssassin could do a good job of filtering spam today (which it can't), the set of messages that SpamAssassin classifies as spam will inevitably differ from the set of messages that Gmail classifies as spam, so the only thing this achieves is another point where you have to worry about false positives and training the classifiers. Furthermore, the problem is exacerbated by poor support of forwarding in modern MTAs. They will queue all received messages first, and when Gmail rejects certain messages during the IMAP session (spam with high confidence, or messages it considers invalid), they result in a bounce, and the thus ensuing backscatter further degrades your mail server's reputation. The closest thing to correct behavior is Exim's cutthrough delivery feature, which has been implemented "relatively" recently, and even so it is not complete and I've run into issues with it with non-textbook setups.
techsupporter 8y ago
Counterpoint 1: I wrote my rant as a separate reply but the summary is that after twenty years of running my own e-mail and doing everything "right," I still got regularly binned by Google and Microsoft and (rarely) Yahoo, so I gave it up and switched to Fastmail. My experience, according to chats with others in my field, is not unique. I'd actually go so far to say that yours, with reliable delivery to Gmail with a small server, is the outlier. https://news.ycombinator.com/item?id=17632081 https://news.ycombinator.com/item?id=17632081

by arpa 8y ago

CyberShadow 8y ago

> you're running a mailserver without spamassasin? What is this, the 1990s? More like, relying on SpamAssassin to reliably and correctly classify spam is the anachronism here. Even if SpamAssassin could do a good job of filtering spam today (which it can't), the set of messages that SpamAssassin classifies as spam will inevitably differ from the set of messages that Gmail classifies as spam, so the only thing this achieves is another point where you have to worry about false positives and training the classifiers. Furthermore, the problem is exacerbated by poor support of forwarding in modern MTAs. They will queue all received messages first, and when Gmail rejects certain messages during the IMAP session (spam with high confidence, or messages it considers invalid), they result in a bounce, and the thus ensuing backscatter further degrades your mail server's reputation. The closest thing to correct behavior is Exim's cutthrough delivery feature, which has been implemented "relatively" recently, and even so it is not complete and I've run into issues with it with non-textbook setups.

techsupporter 8y ago

Counterpoint 1: I wrote my rant as a separate reply but the summary is that after twenty years of running my own e-mail and doing everything "right," I still got regularly binned by Google and Microsoft and (rarely) Yahoo, so I gave it up and switched to Fastmail. My experience, according to chats with others in my field, is not unique. I'd actually go so far to say that yours, with reliable delivery to Gmail with a small server, is the outlier. https://news.ycombinator.com/item?id=17632081 https://news.ycombinator.com/item?id=17632081