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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

Undeliverable Mail File Type
Extension .letter
Developer Not Available
Popularity 5.0 (1 Votes)
Mime Type mime-type/not.available
Default Program Sendmail
Category Misc Files
Format Not Available
Updated 11/1/2024

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 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.

Microsoft Windows logo image Open LETTER File on Windows

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

MacOs logo image - FileProInfo.comOpen LETTER File on Mac OS

Software License Developer
Sendmail image. Sendmail 000 for MacOs Free Sendmail

Linux logo image - FileProInfo.comOpen LETTER file on Linux

Software License Developer
Sendmail image. Sendmail 000 for Linux Free Sendmail

Website logo image - FileProInfo.comOpen LETTER file on Web

Software License Developer

iOS logo image - FileProInfo.comOpen LETTER file on iOS

Software License Developer

Android logo image - FileProInfo.comOpen LETTER file on Android

Software License Developer

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.

LETTER file extension icon image.About LETTER - Undeliverable Mail File

FileProInfo is to help you understand about the Undeliverable Mail File with *.LETTER suffix, and provide the complete detail as how to open, edit, convert, merge, split and compare it with other related software programs, software download links and free online apps and tools.

Our professional team members at FileProInfo have been individually researched and verified the details for LETTER. We want to be 100% accurate and publish the information about file formats, tools, apps and software programs that we have tested and validated.

If you would like to suggest any additions or updates to this page for LETTER, please let us know.

Updated 11/1/2024


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