There are 10 other file types using
the HDR file extension!
.hdr - Procomm Plus message header
.hdr - DataFlex header data
.hdr - ArcView header data
.hdr - Radiance map
.hdr - InstallShield setup header
.hdr - MicroSim PCBoard hole-drill schedule report
.hdr - Photomatix HDR image
.hdr - ENVI header data
.hdr - Transport Fever texture
.hdr - Microsoft IIS Server NNTP header data
HDR file extension - Mail.dat header data
What is hdr file? How to open hdr files?
File type specification:
The hdr file extension is associated with the PostalOne!, a web-based alternative to existing manual mailing processes with electronic suite.
The hdr file stores Mail.dat header data from PostalOne! suite.
This hdr file type entry was marked as obsolete and no longer supported file format.
This type of file is no longer actively used and is most likely obsolete. This is typically the case for system files in old operating systems, file types from long discontinued software, or previous versions of certain file types (like documents, projects etc.) that were replaced in higher versions of their original programs.