LETTER File Extension

LETTER file extension is created by Developer, also known as Undeliverable Mail File. LETTER has been classified as Misc Files. The format of this file type has not been determined yet. You can open LETTER files in Sendmail program.

Undeliverable Mail File Type

What is a LETTER File Type?

You can safely delete dead.letter files. However, there are other problems to send mail, so the file can be recreated. You may therefore have to investigate further to find out why the mail n'is not sent.

Dead.letter can be created by sendmail program d' Unix. It is also sometimes created during l' invocation of the sendmail program with the PHP mail function.

Free online LETTER Tools & Apps

We have also the free online .LETTER (Undeliverable Mail File) file extension apps that can allow to view, edit, convert from to LETTER, merge, split and compare the LETTER files without installing anything on your system. Please click on the links to explore the complete list of details for each required feature.

LETTER Converter

Open LETTER

Edit LETTER

Compare LETTER Files

Merge LETTER Files

Split LETTER Files

LETTER Metadata Viewer

LETTER Files Common Issues

There are few common issues with the Undeliverable Mail File .LETTER File Extensions while opening the .LETTER files on Windows and MacOs, we have solution to those issues such as:

Can't Open LETTER Files?

1. You must have supported software programs installed for Undeliverable Mail File on your system such as Sendmail.
2. Associate default Sendmail Sendmail program for *.letter (Undeliverable Mail File) files.
   
   

   Associate LETTER Default Program on Windows

   1. Right-click a *.LETTER (e.g example.letter) file and click Open With.
   2. In the Open with dialog box, click Sendmail Sendmail program Or click Browse to locate the program (*.exe) that you want.
   3. Select check box for Always use this app to open .letter files.
   
   

   Associate LETTER Default Program on MacOs

   1. Click *.LETTER (e.g example.letter) file and click information -> Open With.
   2. In the programs list, click Sendmail Sendmail program Or other appropriate program that you want.
   3. Confirm Change for all... and Contine.
   4. A message will appear "This change will be applied to all files with .Sendmail extension. By clicking Continue you confirm your selection", click Contine to apply changes.

Related LETTER File Extensions

LETTER default file extension is .LETTER and other similer related extensions are:

All Platform Software Programs for LETTER File Extension

List of all softwares that can open the LETTER files on each platforms such as Windows, Mac, iOS, Linux, Web and Android, you may click the each software link for more details for other supported formats for each software and the verified direct download links for each software with complete lisensing details.

Open LETTER File on Windows

	Software	License	Developer
	Sendmail 000 for Windows	Free	Sendmail
	Solinst Levelogger Software 000 for Windows	Paid	Solinst Levelogger Software

Open LETTER File on Mac OS

	Software	License	Developer
	Sendmail 000 for MacOs	Free	Sendmail

Open LETTER file on Linux

	Software	License	Developer
	Sendmail 000 for Linux	Free	Sendmail

Open LETTER file on Web

Open LETTER file on iOS

Open LETTER file on Android

About Licensing

1. Free Trial This software are often used for an attempt period, like 14 days, before requiring payment. Some trial versions have a reduced feature set.
2. Free This software is liberal to use. Examples include open-source , freeware software, like free programs supported by advertising.
3. Free⁺ This software is liberal to download and use, but contains in-app purchases (IAP) to unlock additional content or functionality.
4. Paid This software must be purchased so as to use it. it's going to be offered as a perpetual license or ongoing subscription.
5. Included with OS This software is bundled with an OS , like Windows, macOS, or Android.

About LETTER - Undeliverable Mail File

Listed file converters are from the wide range of online file converter.

These are the most polular file/document converters based on the user's review and usage on the FileProInfo.