Hi,
We have one user who stopped receiving e-mail notifications suddenly and the problem appears on two Jira instances held within our organization.
He receives notification on Jira site but e-mails are not working as supposed to.
We have reviewed his notification settings as well as project settings and it should work (other users with the same settings and project role receive e-mails), notification helper provides following information:

What may cause such problem? Even despite following notification there was no e-mails received by user:
