Timo Stramann

Can confirm this error on outlook too. Many emails are automatically marked as spam by office 365 because of this I suppose. Would be great to add an option to...

This appears to be an issue happening with outlook, Gmail and those other big freemium services mostly. Outlooks/Gmails default security settings do not allow downloading pictures and Outlook 365 does...

Automatically detecting by the email domain and email meta/header whether it's outlook/Gmail and don't send the tracking pixel (optional setting) could be a solution to reduce the number of users...

[ElasticSearch](https://www.elastic.co) integration or such could help but if you handle that many tickets and want to go thru all of them in your DB, upgrading your resources would be required...