Attachments (word docs and PDFs) to emails can not be opened by the receivers. Are received as .dat files or application/octet-stream
Attachments I add to emails (word doc or PDFs) can not be opened by the email receivers. Word documents attachments are received with ATT00427.dat (application/octet-stream) or .doc with (application/octet-stream). PDF attached files arrive with .pdf (application/octet-stream). My copy of my sent email has the same attachment extensions.
This happened
Every time Firefox opened
Alla svar (1)
Firefox doesn't do email, it's a web browser.
If you are using Firefox to access web mail, you need to seek support from your service provider or a forum for that service.
If your problem is with Thunderbird, see this forum for support. http://www.mozillamessaging.com/en-US/support/ or this one http://forums.mozillazine.org/viewforum.php?f=39