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Comment by ttul | Hacker News Reader

This is going to become a spamming service in 3.. 2..

How will you be dealing with that inevitable problem?

Hi, im one of the engineers that built SESS. I can't get into specifics but we have a nifty little algorithm that works at multiple levels right from checking whether you have a valid business email to email list scanning to match bounces from a master bounce list etc. etc. Finally if it deems the list is risky it triggers an automatic payment refund.

From the about page:

>You are not allowed to send unsolicited emails. If your SBUR (Spam + Bounce + Unsubscribe + Reject) rate is >=5% you are automatically banned without any prior intimation.

They will need to add machine learning based classification of mails before sending them. Spammers will just create the next account until they get detected again. Their servers will be faster on a blacklist than they can spell Spamhaus.

I recommend ULMFiT [1].

[1]: http://nlp.fast.ai/classification/2018/05/15/introducting-ul...

Like i mentioned in an earlier comment, we have a nifty little program that checks both the validity of the business email as well as the domain. Then a sampling of the list is done to weed out troublemakers. We do a little bit more. Unfortunately i can't get into specifics here :)

Ok, nice to hear that. It seems that you've put some thoughts in it. Mail is very easy to mess up, so I wish you all good luck!

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