Log In Looking for answers? You've come to the right place! Our knowledge base is a great place to start getting answers about our products. Enter a keyword or phrase in the search field below to get started. Search How-To Videos Check out our product tutorials. Watch Now Downloads Check out our available downloads. View Downloads Trending Answers Check out our top articles. How do I limit Inbound SMTP Traffic to servers? Note: Do not make any of the changes listed below if you have backup MX records that point directly to your mail server and bypass Zix. If you plan to remove your backup MX records, allow at least 1 week for all Internet caches to clear... How do I allow inbound mail from Email Threat Protection in Office 365? This article will walk you through creating a transport rule in Office 365 (O365) that bypasses filtering for mail from Email Threat Protection (ETP). If you have O365 services with Zix, you can request this setup by contacting our Phenomenal... How do I set up SPF records for hosted services? Sender Policy Framework (SPF) allows the domain owner to specify their mail sending policy, i.e., which mail servers are used to send mail from their domain. This technology requires both the sending and receiving server to work together. The... How do I limit inbound mail to Email Threat Protection in Office 365? This article walks through creating a connector and rules in Office 365 (O365) that will ensure all external mail is filtered and allowed by Email Threat Protection (ETP). If you subscribe to O365 services with Zix, you can request this setup... How do I set up smarthosting for Office 365? Before you proceed with this configuration, make sure that you have ordered SmartHosting service for the affected domain(s) through our sales team or your Partner Portal. You should use the IP 1.1.1.1 when ordering the service. Failure to... Show more Published Answers Explore other Resources View the Resource Center Want to contact us? See the other ways you can get assistance. Submit a Ticket Send a ticket to our Support Agents. Email support@zixcorp.com Phone 1-888-576-4949 Subscription Terms ©1999-2021 Zix Corporation. All rights reserved. This site and Zix marks are protected by copyright and trademark under U.S. and international law.