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A comment on Ask HN: Twilio suspended account because someone sent us a fraud text. Parent comment

Re:Ask HN: Twilio suspended account because someone sent us ... by Xylakant on Thursday January 06, 2022 @07:09PM (#29832657)
But twilio happily accepts spam - at least according to the OP. The message flow according to the post is Spammer -> SMS -> Twilio -> Forward by Customer -> SMS -> Customers own number. So the correct place to check would be on the incoming leg.
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Re:Ask HN: Twilio suspended account because someone sent us ... by onphonenow on Thursday January 06, 2022 @07:29PM (#29832873)
Twilio's absolute responsibility is to protect carriers from getting SMS spam outbound. Twilio has no such contractual requirements from its own customers. Could they offer an addon service for this on the inbound side? Sure. But if you are using their service to send spam and phishing links outbund, they MUST filter that or risk their entire operation.

Spam detection is not perfect. Users may want to process their own messages unmolested inbound.

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