can't send emails via imap or php

[cancian]

Hi, my username is cancian, and I can't send emails using my IMAP account or via PHP on my websites.

I've tried using tommy.heliohost.org as the IMAP server, but it still just receives emails, it doesn't send any. The "forgot my password" also doesn't work on my websites,  no mail is sent.

The affected domains are "Ateus.net" and "Dietclock.app".

Any help is appreciated.

[wolstech]

Your account's email service was removed because you exceeded the 50 per day email limit. Forms being hit by bots, excessive automated notifications, or using the mail forwarding feature are the most common reasons users exceed this limit. Note also that each recipient on an email is considered one email, so a single message sent to two people counts as two emails. 

Do you know why you would've sent more than 50 emails in a day?