How to open LETTER file format? (Undeliverable Mail File)
When during your work you encounter a problem with the LETTER file extension, it is mostly the lack of possibility to see its contents. Its full name is Undeliverable Mail File. The LETTER file belongs to the Misc Files category, and its structure has been developed by the N/A company. In order to open the LETTER file, you must download appropriate software. You will find the applications supporting the LETTER file at the following list. If you install one of the programs from the list, your problems with the LETTER file should stop. If the information presented here does not resolve your problem, go to another page on the topic: .
| Category | Developer/Producer | Software |
|---|---|---|
| Misc Files | N/A | Undeliverable Mail File |
Programs using this file extension
Windows
Mac OS
Linux