If the speed improves instantly, you may need to add an exception for eM Client or keep the mail shield disabled (relying instead on your system's real-time file scanner). IMAP vs. POP3 Performance
eM Client stores your data in a local database. Over time, this database can become fragmented or overly large, leading to slower read/write speeds when handling files. em client slow download attachments
Toggle "Use Hardware Acceleration" if available. For some systems, turning this off prevents the UI from "hanging" while processing large files. Summary Checklist ✅ Enable "Download messages for offline use." ✅ White-list eM Client in your Antivirus settings. ✅ Use the Database Repair tool to fix hidden errors. If the speed improves instantly, you may need
If you are experiencing slow attachment speeds, the problem usually stems from synchronization settings, local database bloat, or interference from third-party security software. Here is a comprehensive guide to diagnosing and fixing the issue. Check Your Synchronization Settings Over time, this database can become fragmented or