SCANPST error

[sidr]

I have been having problems emailing to Gmail and Yahoo users, using MS Outlook 2019, Win 11.
I tried many Outlook settings variations (including POP and IMAP variations), and no help, and Outlook gave unhelpful error messages eg there was a problem, retry.
I tried SCANPST, it said errors, I then repaired... but I then immediately ran scanpst a second time, and it still says errors.
I then tried a 3rd time, and then it says "Only minor inconsistencies were found. Repairing the file is optional" (even though there is no longer an option to Repair).
I loaded Outlook and unloaded it immediately, ran scanpst, but it said errors.
This implies any use of Outlook damages PST, ie cause errors to appear in scanpst.


Or scanpst doesn't repair errors despite saying it does.
I assume 1.7GB is not too large for PST, because I googled and it says 50GB is limit.
Is there some switch (scanpst.exe /?) that makes it more powerful?
If not, can you suggest a more powerful but free/cheap PST repairer?
There is DataNumen and OutlookFix but they charge $199, and there is no guarantee they will fix my original problem emailing to Gmail and Yahoo.