![]() We might not accept email from senders who fail a reverse-DNS lookup. Ensure that you don't advertise yourself as a nonroutable IP Confirm that your DNS is set up correctlyįor instructions about how to create and maintain DNS records, including the MX record required for mail routing, you need to contact your DNS hosting provider. A new IP can expect to be fully ramped within a couple of weeks or less depending on volume, list accuracy, and junk email complaint rates. If your domain has a good sending reputation, new IPs might experience a faster ramp up time. New IPs for domains with existing SPF records typically experience the added benefit of inheriting some of the domain's sending reputation. Once the IP address has built a reputation for not sending spam, EOP typically allows for a better email delivery experience. As a result, email from new sources are more likely to experience delivery issues. IP addresses that have never been used to send email typically don't have any reputation in our systems. Are you sending email from new IP addresses? One of the principal factors in driving down a sender's reputation and their ability to deliver email is their junk email complaint rate. For example, the sending IP, domain, email authentication, list accuracy, complaint rates, content, and more. We also use email authentication technologies like SPF, DKIM, and DMARC to verify that the domain sending the email is authorized to do so. ![]() Are you managing your IP and domain's sending reputation?Įxchange Online Protection (EOP) provides anti-spam protection for Microsoft 365. This article provides troubleshooting information for senders who are experiencing issues when trying to send email to recipients in Microsoft 365, and best practices for bulk mailing to customers. Learn about who can sign up and trial terms here. Did you know you can try the features in Microsoft 365 Defender for Office 365 Plan 2 for free? Use the 90-day Defender for Office 365 trial at the Microsoft 365 Defender portal trials hub.
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