Unable to connect SMTP server:smtpout.mail.zoho.com Reason:Authentication failed:554 5.1.8 Sender Address Blocked

Unable to connect SMTP server:smtpout.mail.zoho.com Reason:Authentication failed:554 5.1.8 Sender Address Blocked

Hello, 
Is it possible to unblock the email info@1totaltech.info? Also, if it possible to raise the 10 bounce minimum so the email address does not get blocked in the future? We send out a newsletter about once a month to 100 to 200 persons and any of the bounces are deleted from the list.

Thank you for your help,
Scott