Le mercredi 17 février 2010 à 02:07 +0100, Mark Martinec a écrit : > > > Look at grey-listing as well. It should be useful if it can distinguish > > > between the user's MUA (or private MTA) and a bot. > > MUAs generally don't cope well with greylisting, as they lack good > mechanisms for automatic retries - so I'm not sure that's a good advice. > > > > Why on earth not? You control T&C for your ISP and can change them. If > > > necessary you can keep existing charges for authenticated connections > > > and raise them for those who don't convert. > > > > My english is not good enough to understand this sorry :p > > T&C = terms and conditions. It's your call to set rules of the game. > > Tell the clients that for a little effort on their part turning on > the SASL authentication and submitting through standard mail submission > ports, they will be gaining a better service with more reliable > acceptance rate by their recipients. > > Here is another good incentive to use a mail submission service of > a domain matching their From address: they gain a valid DKIM signature > on their outgoing mail. For example: when using a gmail From address > it pays off to submit mail to google on port 587 - the message gains > a gmail signature. Sending directly from a home or small office machine > and using a gmail or yahoo From address is likely to be treated as > second-class mail by recipients (not trustworthy, likely to gain > some spam score points). The same (but in reverse) applies to outgoing > mail using your ISP's domain: it pays off to submit it to ISP's > mail submission service, this is the only way to gain its DKIM signature. > Increasing number of domains (like yahoo) treat mail with a valid > DKIM signature favourably.
This really sounds great. More reliable mail for my customer, and a cleaner network for me. Thank you!!!! > Mark
