Verizon email support provides info about web hosting clients that cannot receive an email from the specific sender, the sender domain, email address and IP address being blacklisted. This is known as a spam source and is blocked by the mail server preventing to send emails. users email is very confidential for personal and professional so it's very private for an unknown person and not for public disclosure. DNS, IP address, or even content of the email. When you see this types issue you will need Verizon support email team, these are specialist only for resolving these types of issues and give you important instructions for future work on the email account to prevent the spamming issue. Just dial our toll-free number and resolve issues including in your budget.