Yes, I think so; I've received an email from someone, even though I can't email myself. 

Great. That said, I just got another "Your registered email address @google.com has been unsubscribed due to multiple message delivery failures. You can verify your email address again." and yes, was able to verify.

Yes, I am sure. My form mail to you wasn't quite blank, I wrote today's date and the time I sent it in the body; you got that?

Ok, I've sent another Wikipedia emailUser to myself, and another to User:Reedy on en.wikipedia. Haven't gotten anything. It's been half an hour. My wikipedia email address is set to my google.com address. If this is still Yahoo's fault, I'll write you the Wikipedia article of your choice.

No, the Yahoo email part is not it; I did try to change my email address to a Google email, and got the same (lack of) result.
I also changed my email to a Google email just now, and again tried to mail myself, and haven't gotten anything.
Though I did get the confirmation email that asked me to click on a link that proved I changed my email address.
So whatever the issue is, it affects both Yahoo and Google email, so I think it is on the Wikimedia end.

This is still going on, if anyone is interested. Someone sent me Wikimedia mail, which I didn't get, and to confirm I sent myself mail, which I didn't get.

And ... just now I was able to at least get the form to email myself. (on English Wikipedia) I filled it out, submitted it, and some minutes later, got the "Your registered email address ... has been unsubscribed due to multiple message delivery failures. You can verify your email address again.". Only filled it out once. Now I guess I have to verify again.

Browser, I don't use the Mobile App.This happens on English Wikipedia and Wikimedia Commons.I have a Yahoo account now, but I tried switching to a Google account, same results.Yes, I tried looking in Trash and Spam folders; not there.Note that confirmation emails from switching accounts do show up.Also note that emails I *sent* via Email User also didn't get to the recipients.

I also tried mailing myself from Wikimedia Commons, and got the same lack of response, except the message: "Your registered email address ... has been unsubscribed due to multiple message delivery failures. You can verify your email address again."
I was able to verify successfully - in other words, I do get the verification emails, just not the actual user generated emails.

Also another user said they emailed me through the interface, and I haven't gotten anything (on either of the email accounts I changed preferences to).