Any suggestion please?
On 19 Jan 2017, 09:16 +0000, Martin Brampton <mar...@black-sheep-research.com>, wrote: > This is somewhat related to: > > On 19/01/2017 08:53, Petr Bena wrote: Re: How to effectively block > communication to all domains except whitelisted? > > Since the start of this year, the amount of mail blocked by blacklists > has dived from around 70% to around 30%. At the same time, spam that is > not from blacklisted servers has rocketed. Presumably this is coming > from distributed botnets that never send the same thing from the same > place for long. > > Given the situation, I'm wanting to mark all mail that is not > whitelisted by prefixing *** NOT WHITELISTED *** to the subject line of > all mail coming from servers not listed at dnswl.org. > > How would I set about doing this? >
