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Whitelist is an allowed list of email addresses, IP addresses, domain names, or applications using a cybersecurity strategy. It safeguards our system from harmful threats that can disrupt local networks or the internet. It is created using a strict policy set and access permission by the IT admin.
Often, emails from our client or partner get landed in the spam folder because, due to any filter or mistake, they get blacklisted, so that specific domain emails are marked as spam. Another reason emails get spam is that they can be sent from unknown sources, the lead to neglecting the SPF or DMARC check. Therefore, to avoid such a mistake, we need to add a specific domain and all email addresses based on it to the whitelist.
Exchange Online’s whitelist is an exception to the security configuration that was put in place and was defeated by the program’s anti-spam mechanisms.
There are instances in Office 365 where you might want to whitelist emails:
If the user wants to filter the emails based on Words in the Subject, they can go for this-
The Subject or Body and next Subject include any of these words
If a user wants to prevent spoofing of an allowed domain, they can go for this
A Message header and next includes any of these words.
Now under “Enter text” and dmarc=pass under “Enter words….” Add Authentication-Results
Here put the header to X-ETR and the value to Bypass spam filtering for the Domain.
Here we will use the Microsoft 365 Defender, where Domain will bypass spam protection and sender authentication to whitelist a domain-
Whitelist a domain is a good idea to avoid your important messages getting spammed. But sometimes, even after using this, the messages used get spam, and we don’t get aware of this, so the best way to keep your important data intact with yourself by having a backup copy of that files. To backup your email messages and attachment, we recommend going for a professional Office 365 Backup tool, i.e., Kernel Office 365 Backup & Restore. It’s used backup an entire mailbox; one can use the free trial version to understand its usage. This tool is coded to ease your backup task in 4 simple steps.
Now you must have learned how to whitelist Domain in Office 365. you can check the steps to the whitelist email address in office 365 and more articles of mine that could help you to develop an understanding of Exchange Online, Microsoft Outlook, Microsoft Teams, and SharePoint Online.