[Question]: How to handle rate limiting of SMTP

[tschuehly]

General info

• I checked the troubleshooting page for similar problems

What is your question?

Supabase hard caps the smtp mail delivery to 1 per second:

How should this be handled using the gotrue module?

I get the exception: Supabase failed: over_email_send_rate_limit with message: For security purposes, you can only request this after 0 seconds., code: OverEmailSendRateLimit

Relevant log output (optional)

[jan-tennert]

You can check for the OverEmailSendRateLimit AuthErrorCode:

try {
    supabase.auth.signUpWith(Email)
} catch(e: AuthRestException) {
    when(e.errorCode) {
        AuthErrorCode.OverEmailSendRateLimit -> {
            // Handle the error
        }
        else -> {
            // Other error codes
        }
    }
}

The generic RestException subclasses were superseded by the AuthRestExceptions:

supabase-kt/Auth/src/commonMain/kotlin/io/github/jan/supabase/auth/Auth.kt

Line 100 in 4f06243

* @throws RestException or one of its subclasses if receiving an error response. If the error response contains a error code, an [AuthRestException] will be thrown which can be used to easier identify the problem.

[tschuehly]

Hey @jan-tennert,

I already have an Exception Handler, but I would have to handle the retry mechanism manually in a generic way.

https://github.com/tschuehly/htmx-supabase-spring-boot-starter/blob/master/src%2Fmain%2Fkotlin%2Fde%2Ftschuehly%2Fhtmx%2Fspring%2Fsupabase%2Fauth%2Fservice%2FSupabaseUserService.kt#L249

I think it could be a good idea to maybe introduce a queue or something similar?

[jan-tennert]

Do you mean generally in this repo or implementation wise?
For a web server, wouldn't it be better to redirect the error to the client for it to handle, since the interval could be longer than a second?