Hi @GhostLyrics, there might a bug/issue here with the notifications not coming through because you are the one who set-up the webhooks. See what Mattermost is actually doing is posting using your user account and replacing the name/icon with that of your integration's choosing, as well as adding a 'BOT' tag to the post.
It's possible that on the server (responsible for sending your mail/iOS notifications) that it sees the post is from you (even though it's from a webhook) and skips sending the notification to you. I believe that the desired behaviour is to treat webhook posts as if they were from a different user in this case, so any webhook that you created will still send notifications to you? If so, I will create a ticket to fix this and have it processed by our triage team.
As a workaround for the time being, you can create another user account to create the webhooks for the integrations and that should send notifications to your main account whenever your integration posts.