# Which Problems Are Solved
Twilio supports a robust, multi-channel verification service that
notably supports multi-region SMS sender numbers required for our use
case. Currently, Zitadel does much of the work of the Twilio Verify (eg.
localization, code generation, messaging) but doesn't support the pool
of sender numbers that Twilio Verify does.
# How the Problems Are Solved
To support this API, we need to be able to store the Twilio Service ID
and send that in a verification request where appropriate: phone number
verification and SMS 2FA code paths.
This PR does the following:
- Adds the ability to use Twilio Verify of standard messaging through
Twilio
- Adds support for international numbers and more reliable verification
messages sent from multiple numbers
- Adds a new Twilio configuration option to support Twilio Verify in the
admin console
- Sends verification SMS messages through Twilio Verify
- Implements Twilio Verification Checks for codes generated through the
same
# Additional Changes
# Additional Context
- base was implemented by @zhirschtritt in
https://github.com/zitadel/zitadel/pull/8268❤️
- closes https://github.com/zitadel/zitadel/issues/8581
---------
Co-authored-by: Zachary Hirschtritt <zachary.hirschtritt@klaviyo.com>
Co-authored-by: Joey Biscoglia <joey.biscoglia@klaviyo.com>
# Which Problems Are Solved
- Some smtp server/client combination may have problems with non-ASCII
sender names for example using an umlaut
# How the Problems Are Solved
- The same RFC1342 mechanism that was added in
#https://github.com/zitadel/zitadel/pull/6637 and later improved by
@eliobischof with BEncoding has been added to the sender name that goes
in the From header
# Additional Context
- Closes#7976
* feat: add reply-to header to smtp messages
* fix: grpc reply_to_address min 0 and js var name
* fix: add missing translations
* fix merge and linting
---------
Co-authored-by: Livio Spring <livio.a@gmail.com>
