Support STARTTLS for Sending Invitation Emails - SMTP

[Karaval]

Is your feature request related to a problem?

I get an error in when sending invitation links

Describe the solution you'd like

I'd like an option to enable starttls as it seems to be the issue here.
Emails for alerts are properly sent using the same configurations .

Describe alternatives you've considered

Currently copying the links and sending them manually .

Additional context

Add any other context or screenshots about the feature request here.

Here the error that I get when trying to send an email.
{"level":"ERROR","timestamp":"2025-01-30T09:07:08.664Z","caller":"auth/auth.go:251","msg":"failed to send email","error":"504 5.7.4 Unrecognized authentication type [DUZPR01CA0022.eurprd01.prod.exchangelabs.com 2025-01-30T09:07:08.713Z 08DD40ACCF694CA8]","stacktrace":"go.signoz.io/signoz/pkg/query-service/auth.inviteEmail\n\t/home/runner/work/signoz/signoz/pkg/query-service/auth/auth.go:251\ngo.signoz.io/signoz/pkg/query-service/auth.Invite\n\t/home/runner/work/signoz/signoz/pkg/query-service/auth/auth.go:112\ngo.signoz.io/signoz/pkg/query-service/app.(*APIHandler).inviteUser\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/http_handler.go:1952\ngo.signoz.io/signoz/pkg/query-service/app.(*APIHandler).RegisterRoutes.(*AuthMiddleware).AdminAccess.func68\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/auth.go:120\nnet/http.HandlerFunc.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2171\ngo.signoz.io/signoz/pkg/query-service/app.LogCommentEnricher.func1\n\t/home/runner/work/signoz/signoz/pkg/query-service/app/server.go:404\nnet/http.HandlerFunc.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2171\ngo.signoz.io/signoz/ee/query-service/app.loggingMiddleware.func1\n\t/home/runner/work/signoz/signoz/ee/query-service/app/server.go:399\nnet/http.HandlerFunc.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2171\ngo.signoz.io/signoz/ee/query-service/app.(*Server).analyticsMiddleware-fm.(*Server).analyticsMiddleware.func1\n\t/home/runner/work/signoz/signoz/ee/query-service/app/server.go:569\nnet/http.HandlerFunc.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2171\ngo.signoz.io/signoz/ee/query-service/app.setTimeoutMiddleware.func1\n\t/home/runner/work/signoz/signoz/ee/query-service/app/server.go:601\nnet/http.HandlerFunc.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2171\ngithub.com/gorilla/mux.(*Router).ServeHTTP\n\t/home/runner/go/pkg/mod/github.com/gorilla/mux@v1.8.1/mux.go:212\ngo.signoz.io/signoz/ee/query-service/app.(*Server).createPublicServer.(*Cors).Handler.func2\n\t/home/runner/go/pkg/mod/github.com/rs/cors@v1.11.1/cors.go:289\nnet/http.HandlerFunc.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2171\ngo.signoz.io/signoz/ee/query-service/app.(*Server).createPublicServer.CompressHandler.CompressHandlerLevel.func3\n\t/home/runner/go/pkg/mod/github.com/gorilla/handlers@v1.5.1/compress.go:141\nnet/http.HandlerFunc.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2171\nnet/http.serverHandler.ServeHTTP\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:3142\nnet/http.(*conn).serve\n\t/home/runner/go/pkg/mod/golang.org/toolchain@v0.0.1-go1.22.7.linux-amd64/src/net/http/server.go:2044"}

[welcome]

Thanks for opening this issue. A team member should give feedback soon. In the meantime, feel free to check out the contributing guidelines.

[kanno41]

We're also running into this issue.