Blocking of Emails for No Reason

<p>My father has an Mweb account and has had it for nearly 20 years. He uses it for his small business and relies heavily on emails for payments and jobs. Mweb decided to block his email address recently due to "suspected spam" behaviour or some other bogus reason. What business does Mweb have to block the email of a paying client they have had for so long. Do they think that all of a sudden he is a ********? We are now looking at other service providers since Mweb has proven to be *************.</p>