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Sorry to hear you’re facing problems. 
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Getting help
In order to help you as efficiently (and quickly!) as possible, please fill in as much of the below requested information as you can.
Before clicking submit: Please check if your query is already addressed via the following resources:
- Official documentation (searchable and regularly updated)
- How to topics and FAQs
- Forum search
(Utilizing these existing resources is typically faster. It also helps reduce the load on our generous volunteers while elevating the signal to noise ratio of the forums otherwise arising from the same queries being posted repeatedly).
Some or all of the below information will be requested if it isn’t supplied; for fastest response please provide as much as you can. 
The Basics
- Nextcloud Server version (e.g., 29.x.x):
- 31.0.8
- Operating system and version (e.g., Ubuntu 24.04):
- ubunt 24.04
- Web server and version (e.g, Apache 2.4.25):
- nginx version: nginx/1.24.0 (Ubuntu)
- Reverse proxy and version _(e.g. nginx 1.27.2)
- pfsense/haproxy
- PHP version (e.g, 8.3):
- 8.3
- Is this the first time you’ve seen this error? (Yes / No):
- No
- When did this problem seem to first start?
- This is in regards to nc mail app. I have installed multiple times in the past and can never get email to render in a reasonable amount of time 8 to 12 seconds per email. (yahoo, gmail, aol). Using my own email server takes approximately a second to load.
- Installation method (e.g. AlO, NCP, Bare Metal/Archive, etc.)
- Bare Metal
- Are you using CloudfIare, mod_security, or similar? (Yes / No)
- I use both cloudflare > pfsense/haproxy > nginx/mod_security for connection
Summary of the issue you are facing:
I had been using snappy mail for a long time. Unfortunately I a profound issue with my server requiring a rebuild. I was able to recover most things but needed to reinstall snappy. Unfortunately their server is down and looks like something is going on there that makes me believe it may not come back. I need to have something that i dependable. Any case I once again installed nextcloud mail. It is painful in trying to load email messages. Average is 10 seconds unless it is my local mail server. I have scoured the internet and have done things like update database, mime types and all the other usual suspects. Nothing seems to help.
Steps to replicate it (hint: details matter!):
- open mailbox
- open email
- wait
Log entries
I do not see any nginx_error log, modsec security audit , nextcloud log.. Opening a developer console I will see the following
The iframe (iFrameResizer2) has not responded within 5 seconds. Check @iframe-resizer/child package has been loaded in the iframe.
The happens for each email I attempt to open an email. I have attempted to use this app in the past with similar results. I have spent a lot of time staring at this and would love any input
Nextcloud
Please provide the log entries from your Nextcloud log that are generated during the time of problem
No Errors
#### Web Browser
If the problem is related to the Web interface, open your browser inspector *Console* and *Network* tabs while refreshing (reloading) and reproducing the problem. Provide any relevant output/errors here that appear.
The iframe (iFrameResizer2) has not responded within 5 seconds. Check @iframe-resizer/child package has been loaded in the iframe.
#### Web server / Reverse Proxy
Nothing in the haproxy/firewall/nginx when these errors occur
`
## Configuration
#### Nextcloud
The output of `occ config:list system` or similar is best, but, if not possible, the contents of your `config.php` file from `/path/to/nextcloud` is fine (make sure to remove any identifiable information!):
t@server2:/var/www/nextcloud# sudo -u www-data php occ config:list system
{
“system”: {
“instanceid”: “REMOVED SENSITIVE VALUE”,
“passwordsalt”: “REMOVED SENSITIVE VALUE”,
“secret”: “REMOVED SENSITIVE VALUE”,
“trusted_domains”: [
“cloud.dakota-web.net”,
“localhost”,
“127.0.0.1”
],
“session_lifetime”: 86400,
“remember_login_cookie_lifetime”: 86400,
“session_keepalive”: false,
“auto_logout”: true,
“datadirectory”: “REMOVED SENSITIVE VALUE”,
“dbtype”: “mysql”,
“version”: “31.0.8.1”,
“overwrite.cli.url”: “https://cloud.dakota-web.net”,
“overwritehost”: “cloud.dakota-web.net”,
“overwriteprotocol”: “https”,
“overwritewebroot”: “/”,
“trusted_proxies”: “REMOVED SENSITIVE VALUE”,
“dbname”: “REMOVED SENSITIVE VALUE”,
“dbhost”: “REMOVED SENSITIVE VALUE”,
“dbport”: “”,
“dbtableprefix”: “oc_”,
“mysql.utf8mb4”: true,
“dbuser”: “REMOVED SENSITIVE VALUE”,
“dbpassword”: “REMOVED SENSITIVE VALUE”,
“installed”: true,
“memcache.distributed”: “\OC\Memcache\Redis”,
“memcache.local”: “\OC\Memcache\Redis”,
“memcache.locking”: “\OC\Memcache\Redis”,
“redis”: {
“host”: “REMOVED SENSITIVE VALUE”,
“port”: 6379
},
“maintenance”: false,
“maintenance_window_start”: 1,
“default_phone_region”: “US”,
“memories.db.triggers.fcu”: true,
“memories.exiftool”: “/var/www/nextcloud/apps/memories/bin-ext/exiftool-amd64-glibc”,
“memories.vod.path”: “/var/www/nextcloud/apps/memories/bin-ext/go-vod-amd64”,
“app_install_overwrite”: [
“mail_roundcube”,
“backup”,
“snappymail”
],
“mail_from_address”: “REMOVED SENSITIVE VALUE”,
“mail_smtpmode”: “smtp”,
“mail_sendmailmode”: “smtp”,
“mail_domain”: “REMOVED SENSITIVE VALUE”,
“mail_smtphost”: “REMOVED SENSITIVE VALUE”,
“mail_smtpport”: “587”,
“mail_smtpauth”: 1,
“mail_smtpname”: “REMOVED SENSITIVE VALUE”,
“mail_smtppassword”: “REMOVED SENSITIVE VALUE”,
“data-fingerprint”: “b75749e3d9f2b3944e61378be636b2df”,
“loglevel”: 1,
“debug”: false,
“theme”: “”,
“memories.vod.ffmpeg”: “/usr/bin/ffmpeg”,
“memories.vod.ffprobe”: “/usr/bin/ffprobe”,
“backgroundjobs_mode”: “cron”,
“files.chunked_upload.max_size”: 52428800,
“enable_previews”: true,
“enabledPreviewProviders”: [
“OC\Preview\Image”,
“OC\Preview\MP3”,
“OC\Preview\TXT”,
“OC\Preview\MarkDown”,
“OC\Preview\PDF”,
“OC\Preview\Movie”,
“OC\Preview\MSOffice2003”,
“OC\Preview\MSOffice2007”,
“OC\Preview\MSOfficeDoc”,
“OC\Preview\OpenDocument”,
“OC\Preview\StarOffice”,
“OC\Preview\SVG”,
“OC\Preview\TIFF”,
“OC\Preview\HEIC”,
“OC\Preview\HEIF”
],
“ratelimit.protection.whitelist”: [
“192.168.8.114”
],
“memories.gis_type”: 1
}
}
#### Apps
The output of `occ app:list` (if possible).
root@server2:/var/www/nextcloud# sudo -u www-data php occ app:list
Enabled:
- activity: 4.0.0
- app_api: 5.0.2
- bruteforcesettings: 4.0.0
- calendar: 5.5.2
- circles: 31.0.0
- cloud_federation_api: 1.14.0
- comments: 1.21.0
- contacts: 7.2.6
- cookbook: 0.11.3
- dashboard: 7.11.0
- dav: 1.33.0
- drawio: 3.1.0
- external: 6.0.2
- federatedfilesharing: 1.21.0
- federation: 1.21.0
- files: 2.3.1
- files_downloadlimit: 4.0.0
- files_external: 1.23.0
- files_pdfviewer: 4.0.0
- files_reminders: 1.4.0
- files_sharing: 1.23.1
- files_trashbin: 1.21.0
- files_versions: 1.24.0
- firstrunwizard: 4.0.0
- logreader: 4.0.0
- lookup_server_connector: 1.19.0
- mail: 5.3.2
- memories: 7.6.2
- nextcloud_announcements: 3.0.0
- notes: 4.12.3
- notifications: 4.0.0
- oauth2: 1.19.1
- password_policy: 3.0.0
- photos: 4.0.0
- previewgenerator: 5.9.0
- privacy: 3.0.0
- profile: 1.0.0
- provisioning_api: 1.21.0
- recognize: 9.0.7
- recommendations: 4.0.0
- related_resources: 2.0.0
- richdocuments: 8.7.4
- richdocumentscode: 25.4.403
- serverinfo: 3.0.0
- settings: 1.14.0
- sharebymail: 1.21.0
- support: 3.0.0
- survey_client: 3.0.0
- systemtags: 1.21.1
- text: 5.0.0
- theming: 2.6.1
- twofactor_backupcodes: 1.20.0
- updatenotification: 1.21.0
- user_status: 1.11.0
- viewer: 4.0.0
- weather_status: 1.11.0
- webhook_listeners: 1.2.0
- workflowengine: 2.13.0
Disabled:
- admin_audit: 1.21.0
- contactsinteraction: 1.12.0 (installed 1.11.0)
- encryption: 2.19.0
- suspicious_login: 9.0.1
- twofactor_nextcloud_notification: 5.0.0
- twofactor_totp: 13.0.0-dev.0
- user_ldap: 1.22.0
Let me know if you would like further information for testing. Unless I can come up with a solution I'm going to have to move on to something else to use that works...