Don't seem to receive mail
I've suspected for a while that some mail isn't arriving, and now I'm near certain. I lodged a query on a website that required I enter the email address - and it had "a copy of this has been sent to your address at <my address>", I have made certain that it's the correct address - but the email hasn't arrvie.
I have already checked https://help.yahoo.com/kb/SLN22021.html
and have
- Confirmed it's not in SPAM
- Confirmed it's not in another folder
- Deleted all filters (just in case)
This is quite frustrating because some of the emails I suspect I've missed would likely have been quite important.
I can't replicate the problem because I am getting some email (perhaps ironically, obvious spam seems to get through fine).
Any ideas would be much appreciated.

Hi there,
Could you please message us on Twitter at @YahooCare or on Facebook at Yahoo Customer Care? We'd like to look more into the issue you're experiencing. In case you do not have a social media account, we are also available at: help.yahoo.com
Looking forward to your reply!
Thank you,
Yahoo Mail team