A Message header > includes any of these words. This way you can further filter the emails based on a word in the subject line. The Subject or Body > Subject includes any of these words. Other additional conditions to uses are. Enter the IP Address of the application. Click add condition and choose IP Address is in any of these ranges. Enter the domain that you want to whitelist. Under Apply this rule if, select Domain is. How to whitelist a website on office 365 email domain plus#
Click on the plus icon and select Bypass Spam Filtering. To whitelist a domain with a mail flow rule we first need to open the Exchange Admin Center. Because you probably know from which IP Address the mail is sent. And as an extra check, filter on IP Address. Then you can create a mail flow rule, and filter on sender or domain. When you have a web application, that sends an automatically generated email that you want to whitelist. Like part of the subject, DMARC result, or even a specific IP Address. The advantage is mail flow rules is that we can whitelist a domain and also add some additional checks to it. We are going to start with the recommended way, using mail flow rules. Whitelist a Domain in Office 365 with Mail flow rules That is why mail flow rules are the recommended way to whitelist a domain. Because when filtering simply on a domain name alone, you also set the door open for spoofed phishing mails for that domain. When it comes to excluding a domain from spam filtering, it’s important to be as specific as possible about the source. Other options are to whitelist on IP Address in Office 365 or use the safe sender list in Outlook. 
The two most common ways to whitelist a domain on a tenant level are by either using a mail flow rule (recommended) or by adding the domain to the allowed sender list in de anti-spam policy. It can be that it’s sent from an untrusted source, failed the SPF or DMARC check, or even based on the content of the email. There are various reasons why an email is marked as spam.
There are multiple ways to whitelist a domain in Office 365, but it’s important that you understand the implication of the different methods. In this article, we are going to take a look at the different options to whitelist a domain in Office 365. But when emails from trusted senders are marked as spam we need to find a way to override this and safely deliver the mail into the user’s inbox. This is of course unwanted, so how do you whitelist a domain in Office 365? And how can we do it safely without opening the doors for phishing emails?įiltering out spam emails is important to prevent malware and phishing emails from ending up in your user’s mailboxes. Sometimes legitimate email ends up in the junk folder after being marked as spam by Exchange Online.
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