Does not send mail from 4.3.1

It also will not work in 4.3.1 for me as well. Have around 70 users and when I publish a new post no emails are sent. Checked the spam folder as well and not being sent there. Do not get any error messages or see anything else, just no emails. Hope you can help!

Same here…
Any fix??

I’m not sure if this is related, but I’ve had to set a ‘to’ address in wp_mail() on line 461 of notify-users-e-mail.php to get this running again. I’ve also set the ‘From’ address n $headers (just above) as well, to override the default behaviour.

Like the posts above, I had no errors, and other services were using wp_mail() just fine on the same server.