IBM Lotus Notes file extensions

Lotus Notes is a popular email client mostly among the corporate users and it is owned by IBM. It provides facilities like emails, calendars, to-do-lists, contact management and many more. The entire database of the user is stored in .nsf file format. Lotus Notes has introduced several versions and the latest version is IBM Notes 10.0

.NSF file stands for Notes Storage Facility. A .nsf file can be encrypted in different ways:
Mail Encryption
Field Encryption
Port Encryption
Document Encryption
Database Encryption

• IBM Notes can function as IMAP and POP email client with non-Domino mail servers.
• It helps the user to protect the database from viruses with its security features.
• IBM Notes has the capability to view the availability of invitees, room, and

Names.nsf – It contains personal address book including contacts and locations.
Mailbox.nsf – It consists of emails, calendars and to-do-list.
Bookmark.nsf – It contains your saved bookmarks.
Headline.nsf – It contains database subscriptions information.
Busytime.nsf – It contains local free time information.
Perweb.nsf – It contains web browser information.

.box
.dll
.dic
.lck
.nbf
.ntf
.ncf