Files with zl1 file extension can be found as ADP files renamed by the MailSafe service in ZoneAlarm.

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Software that open zl1 file

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ZL1 file extension - ZoneAlarm Mailsafe renamed ADP data

What is zl1 file? How to open zl1 files?

File type specification:

Various data file type icon Various data file type

zl1 file icon: zl1 filetype icon

The zl1 file extension is associated with ZoneAlarm, a personal firewall software, originally created by Zone Labs and currently developed by CheckPoint Software Technologies LTD.

One of ZoneAlarm features is MailSafe, which detects e-mail attachments and warns the user about their presence. When a potentially dangerous attachment is detected, the program quarantines the file with simple renaming of its original file extension, so it breaks the common program association function in Windows and prevents such files from being executed (or launched via associated program).

A file with zl1 file extension originally had ADP file extension (most likely Microsoft Access project file). Simple renaming will restore the Windows associations with such file, however it is not advised, unless you are absolutely sure it safe to do.

The default software associated to open zl1 file:

ZoneAlarm Pro icon

Check Point Software Technologies Ltd. logoZoneAlarm Pro  Microsoft Windows software

Company or developer:
Check Point Software Technologies Ltd.

ZoneAlarm Pro is a set of tools used to protect computer against hacker attacks,destroy spyware, and secure privacy.

Related articles:

Mailsafe renamed file extensions

Help how to open:

You can rename the *.zl1 file extension back to ADP and work with the file normally. This can however be potentially dangerous, because the file was quarantined for a reason. So always re-check it with your anti-virus or anti-spyware programs before you rename the files.

How to convert:

Probably cannot be exported to other formats.

List of recommended software applications associated to the .zl1 file extension

Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open zl1 file, edit zl1 file, convert zl1 file, view zl1 file, play zl1 file etc. (if exist software for corresponding action in's database).

Unspecified and all other actions for computer programs working with zl1 file - ZoneAlarm Mailsafe renamed ADP data

Click on the software link for more information about ZoneAlarm Pro. ZoneAlarm Pro uses zl1 file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).

Microsoft Windows:

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