On 13/11/18 09:05, Rob Janssen wrote:
Not being a gmail.com user myself, I do not exactly know what features it offers for whitelisting or other special treatment of mail, or maybe what it learns automatically. It could be that sending back and forth several mails eventually leads to an address getting on the whitelist automatically. The same could be true for mail server IP addresses (like a mailinglist server), and it could be that knowledge built in the past also affects the results of new SPAM criteria added later.
Gmail has an automated spam filter, which supposedly learns from the vast body of email that flows through Gmail. It's not bad, but being somewhat reliant on learning from user reactions and traffic patterns, it does make a mistake every now and then.
However, the good news is you can override the spam filter by creating a filter that finds list posts and in the filter set the action "Never send to Spam", in addition to any other filtering actions you'd like to take. That is your whitelist.
It is all a bit opaque, and when you want reliable and predictable mail service, using those mailservices certainly is not the best choice... or at the least check the SPAM folder regularly. (but I have also received reports of mail being dropped and not placed there)
That I haven't seen with Gmail, but it is very common with Hotmail.