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A comment on Eliminating Robocalls. Parent comment

Re:Eliminating Robocalls by 6nf on Monday March 18, 2019 @09:38PM (#19427303)
Sign up for any random SMS API service. You'll note that you can send SMS using anything you like as the 'from' field. There's no checks or restrictions. Same goes for voice calls in most cases.
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Re:Eliminating Robocalls by metildaa on Tuesday March 19, 2019 @06:17AM (#19429507)
Which ones actually support this?

From what I've tested, T-Mobile and Verizon will both fail to deliver SMSes that aren't originated by the carrier listed in the SMS routing for a phone # (which is wholly separate from the PSTN routing of a number, and can be a source of problems when changing cell carriers).

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Re:Eliminating Robocalls by 6nf on Tuesday March 19, 2019 @05:41PM (#19436274)
I'm using the noname brand resellers, not the carriers themselves. I guess that's why.
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Re:Eliminating Robocalls by metildaa on Tuesday March 19, 2019 @07:53PM (#19437443)
I've tried a dozen thus far to no avail :c

I can hijack SMS routing entirely for inbound/outbound, but short of doing that I can't forge the from field and get the message delivered.

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Re:Eliminating Robocalls by 6nf on Tuesday March 19, 2019 @08:46PM (#19437767)
Hmm maybe it has changed recently...
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