🐛 Bug Report: Messages page broken after a SMTP misconfiguration

### 👟 Reproduction steps

1. Get fresh installation of a 1.7.4.
2. Go to messages, misconfigure the SMTP so that appwrite cannot connect to it
3. Try to send an email
4. Try to go to messages page

### 👍 Expected behavior

Show the messages page correctly

### 👎 Actual Behavior

500 general error blocking access to messages page.

This is what I recovered from our Sentry logs:
`{
"event_id": "669136d6e2c94d2baac365afb9c6c32d",
"project": 4509607013384272,
"release": "1.7.4",
"platform": "php",
"message": "deliveryErrors must be an array of type string",
"datetime": "2025-07-04T00:38:22+00:00",
"tags": [
["code", "0"],
["database", "database_db_main"],
["environment", "production"],
["level", "error"],
["logger", "http"],
["method", "GET"],
["projectId", "6867131b00002f0a35d5"],
["release", "1.7.4"],
["service", "UNKNOWN_NAMESPACE.UNKNOWN.METHOD"],
["transaction", "UNKNOWN_NAMESPACE.UNKNOWN.METHOD"],
["url", "/v1/messaging/messages"],
["verboseType", "Exception"]
],
"_meta": {
"exception": {
"values": {
"0": {
"stacktrace": {
"frames": {
"": {
"err": [
["invalid_data", { "reason": "expected a non-empty value" }]
]
}
}
}
}
}
},
"tags": {
"3": {
"1": {
"": {
"err": [
["invalid_data", { "reason": "expected a non-empty value" }]
]
}
}
}
}
},
"_metrics": {
"bytes.ingested.event": 3184,
"bytes.stored.event": 3792
},
"culprit": "UNKNOWN_NAMESPACE.UNKNOWN.METHOD",
"environment": "production",
"errors": [
{ "type": "invalid_data", "name": "exception.values.0.stacktrace.frames", "reason": "expected a non-empty value" },
{ "type": "invalid_data", "name": "tags.3.1", "reason": "expected a non-empty value" }
],
"exception": {
"values": [
{
"type": "deliveryErrors must be an array of type string",
"stacktrace": { "frames": null }
}
]
},
"extra": {
"file": "/usr/src/code/src/Appwrite/Utopia/Response.php",
"line": 688,
"trace": "#0 /usr/src/code/src/Appwrite/Utopia/Response.php(715): Appwrite\\Utopia\\Response->output(Object(Utopia\\Database\\Document), Object(Appwrite\\Utopia\\Response\\Model\\Message))\n#1 /usr/src/code/src/Appwrite/Utopia/Response.php(615): Appwrite\\Utopia\\Response->output(Object(Utopia\\Database\\Document), Object(Appwrite\\Utopia\\Response\\Model\\BaseList))\n#2 /usr/src/code/app/controllers/api/messaging.php(3422): Appwrite\\Utopia\\Response->dynamic(Object(Utopia\\Database\\Document), 'messageList')\n#3 /usr/src/code/vendor/utopia-php/framework/src/App.php(609): {closure}(Array, '', Object(Utopia\\Database\\Database), Object(Appwrite\\Utopia\\Response))\n#4 /usr/src/code/vendor/utopia-php/framework/src/App.php(826): Utopia\\App->execute(Object(Utopia\\Route), Object(Appwrite\\Utopia\\Request), Object(Appwrite\\Utopia\\Response))\n#5 /usr/src/code/vendor/utopia-php/framework/src/App.php(723): Utopia\\App->runInternal(Object(Appwrite\\Utopia\\Request), Object(Appwrite\\Utopia\\Response))\n#6 /usr/src/code/app/http.php(454): Utopia\\App->run(Object(Appwrite\\Utopia\\Request), Object(Appwrite\\Utopia\\Response))\n#7 [internal function]: {closure}(Object(Swoole\\Http\\Request), Object(Swoole\\Http\\Response))\n#8 {main}"
},
"level": "error",
"logentry": { "formatted": "deliveryErrors must be an array of type string" },
"logger": "http",
"metadata": { "type": "deliveryErrors must be an array of type string", "value": "" },
"title": "deliveryErrors must be an array of type string",
"transaction": "UNKNOWN_NAMESPACE.UNKNOWN.METHOD",
"type": "error"
}
`

### 🎲 Appwrite version

Different version (specify in environment)

### 💻 Operating system

Linux

### 🧱 Your Environment

1.7.4 self-hosted

### 👀 Have you spent some time to check if this issue has been raised before?

- [x] I checked and didn't find similar issue

### 🏢 Have you read the Code of Conduct?

- [x] I have read the [Code of Conduct](https://github.com/appwrite/.github/blob/main/CODE_OF_CONDUCT.md)