What it does
ReliefJet Essentials is a collection of Outlook utilities with email-format conversion, import, export, and batch processing. It runs as an Outlook add-in, standalone application, or Windows command-line tool.
The suite covers EML, MSG, MBOX, PST, OST and TNEF-related conversions. For MSG-to-EML, select source/destination folders and subfolder mode, then run. Output retains names with a new extension unless macros build other names/folders. EML carries supported content and attachments but omits some internal Outlook properties.
Classic Outlook on Windows is required; New Outlook is unsupported. The trial allows at most 10 runs per utility, with possible extra limits, even though this converter’s feature page specifies no file-count/size restriction. CLI and Task Scheduler integration require Professional.
Strengths
- Combines mail conversion with manual, scheduled, and scripted operation.
Best for
- Recurring Outlook export and mail-format conversion
Sources
- ReliefJet Essentials Overview - ReliefJet for Outlook (Oct 26, 2026)
- Convert MSG to EML - ReliefJet for Outlook (Oct 26, 2026)
- Download Products - ReliefJet for Outlook (Oct 26, 2026)