Greylisting and other anti-spam features
We’ve made some more improvements to our anti-spam service. The most important one being the introduction of Greylisting.
Greylisting works by temporarily rejecting email from people who have never emailed you before. Any legitimate, standards compliant, mail server will retry delivery of the email after a short period. Many spammers use non-standard mail servers which are simply designed to “fire and forget” in order to send the most spam in the shortest period of time - they rely on volume.
This also has the advantage that it increases the likelihood that the realtime blacklist (RBL) and distributed clearing houses we use will detect any spam.
This means that the first time (and only the first time) you receive an email from somebody it may take a few extra minutes to arrive. There is, however an increase in performance on our mail servers gained by reducing the amount of spam we process. We continue to monitor the situation and will as always work to ensure we are providing the best service to our customers. Please do contact us if you think this is causing a problem for you.
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