how to mark email domain safe?

Hi @Thomas Nancy, 

Thank you for posting your question in the Microsoft Q&A forum.  

The issue you mentioned relates to marking an email domain as safe or unblocking it in Outlook for iOS. To provide the most accurate guidance, could you confirm: 

• Are emails from this domain currently going to Junk Email, or are they being blocked completely? 
• Do you manage your mailbox through a personal account (e.g., Outlook.com, Hotmail.com) or a work/school account provided by an organization? 

These details help us ensure the steps fit your environment. 

Outlook uses built-in security filters to protect against spam and phishing. Sometimes, legitimate domains can be flagged due to filtering rules or organizational policies. 

Currently, Outlook for iOS does not have a direct option to add Safe Senders within the app. However, you can manage this through your account settings: 

1/ Begin by accessing Outlook Web settings to review and adjust your configuration for optimal performance. 

• Sign in at outlook.office.com or open New Outlook desktop app. 
• Go to Settings > Mail > Junk email. 
• Under Safe senders and domains, select Add, then enter the domain (e.g., @example.com). 
• Save changes. These settings apply across all devices, including iOS. 

2/ If your account managed by organization: 

• Contact your IT admin to add the domain to the Tenant Allow/Block List in Microsoft 365 Defender. This ensures emails from that domain are allowed for all users. 

Adding the domain to Safe Senders ensures messages bypass junk filtering, while admin-level changes apply organization-wide. 

Please understand that our initial response does not always resolve the issue immediately. However, with your help and more detailed information, we can work together to find a solution.  

I hope this information is helpful. Please follow these steps and let me know if it works for you. If not, we can work together to resolve this.  

Thank you for your patience and your understanding. If you have any questions, please feel free to reach out.  

I'm looking forward to your reply.  

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