Outlook 2016 OST thinks it is PST?


Senior Member
Outlook version
Outlook 2016 64 bit
Email Account
Had to change the password on the "hawaii.rr.com account. I think I have to change the password on the Outlook file. Is that correct? My outbound mail is arriving to others stripped of its content. Only the headers.
So I thought I would have to reach the settings in the "rr.com" file settings and somehow change the password. I remember it from the good 'ol days, but it seems obsolete.
What the heck can I do in this situation? Why does the pop-up say the file has to use the (.ost) format when it seems to be that in the settings clip below? I'm deeply confused. Can I make the rr.com file the default? Should I?
Thanks for any enlightenment.


Diane Poremsky

Senior Member
Outlook version
Outlook 2016 32 bit
Email Account
Office 365 Exchange
If you changed you email password, you will need ot change it in outlook. If outlook doesn't ask, do it in Send & Receive settings - Ctrl+Alt+S - then click Edit, select the account then Account Properties. Password field on is the first tab.

IMAP accounts use ost files now. Not sure why the error message - you can't change the delivery location for imap accounts.

Are you using 3rd party antivirus software that also scans email? It can corrupt the mail.