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commented
2 years ago Can you please verify, that you can connect to the smtp server using a different program. It seems as if a firewall is blocking your connection.
On android try: https://k9mail.app/ and configure the outgoing smtp server with smtp.gmail.com / 587
On an iphone the native mail app should allow you to configure an outgoing server.
I am following documentation as it is. but I am getting this error. [ERROR:flutter/lib/ui/ui_dart_state.cc(209)] Unhandled Exception: SocketException: Connection timed out, host: smtp.gmail.com, port: 587
0 _NativeSocket.connect.. (dart:io-patch/socket_patch.dart:920:11)
1 _rootRun (dart:async/zone.dart:1420:47)
2 _CustomZone.run (dart:async/zone.dart:1328:19)
3 Future.timeout. (dart:async/future_impl.dart:865:34)
4 _rootRun (dart:async/zone.dart:1420:47)
5 _CustomZone.run (dart:async/zone.dart:1328:19)
6 _CustomZone.runGuarded (dart:async/zone.dart:1236:7)
7 _CustomZone.bindCallbackGuarded. (dart:async/zone.dart:1276:23)
8 _rootRun (dart:async/zone.dart:1428:13)
9 _CustomZone.run (dart:async/zone.dart:1328:19)
10 _CustomZone.bindCallback. (dart:async/zone.dart:1260:23)
11 Timer._createTimer. (dart:async-patch/timer_patch.dart:18:15)
12 _Timer._runTimers (dart:isolate-patch/timer_impl.dart:395:19)
13 _Timer._handleMessage (dart:isolate-patch/timer_impl.dart:426:5)