In the context of electronic messaging, "spam" means unsolicited, bulk or
indiscriminate messages, typically sent for a commercial purpose.
We have a zero-tolerance policy. If spam being send from any mailbox, we send
out an official notification and warning and we will limit your mailbox to send emails
to maximum 50 recipients at the same time. If mailing behavior is normalized, the
limit will be removed after 3 months. If spam does happen again, we will limit the
number of emails that can be send per week. If spam continues, ultimately we will
block and delete the account immediately without any warning on user’s own