Office 365 SMTP Settings and How to Configure It + POP3 and IMAP Settings

Created On
February 2, 2023
Office 365 SMTP Settings and How to Configure It + POP3 and IMAP Settings

Are you looking for Office 365 SMTP settings? Popularly known as Office 365, Microsoft 365, offers a plethora of features including email hosting services. Tech giant Microsoft groups a few of its software and services under the brand name Office 365. This cloud-powered productivity platform offers its subscribers various productivity software and related services. 

Office 365 offers business users: 

  • Microsoft Office Package – MS Word, PowerPoint, Excel, Outlook, and OneDrive. 
  • The freedom to use these tools in iMacs, PCs, mobiles, and tablets. 
  • OneDrive could storage up to 1 TB. 
  • On-time feature updates and free upgrades.  
  • Social Networking Services – Yammer integration, Exchange Server, SharePoint, Skype for Business, and Office Online. 
The Office 365 SMTP settings enables you to send emails from the email client you are using, without directly using your Microsoft 365 webmail.

In addition to the Office 365 SMTP settings, we've shared the POP3 and IMAP settings in this blog post. We've also included how to find SMTP server in Outlook 365 and a step-by-step guide to SMTP Server Settings for Office 365 configuration.

Let's get started.

Benefits of Microsoft Office 365

  • Enhanced data and device protection with Microsoft Defender. 
  • Organized workflow with cross-functional digital notebook, OneNote. 
  • Data backup and security with built-in ransomware detection and OneDrive. 
  • Seamless collaboration with MS Office package (Word, Excel, PowerPoint, etc.) 
  • Ad-free email (Outlook) for business organization. 

How does Email Protocols Help You?

SMTP or Simple Mail Transfer protocol is the worldwide standard email protocol for sending emails. And if you don't build your SMTP server, you can still send emails with the SMTP relay service.

On the other hand, IMAP (Internet Message Access Protocol) is an email retrieval (incoming) protocol. You can access your email across all devices with IMAP configuration. And POP3 (Post Office Protocol) is also used for receiving emails but on a single device.

Office 365 SMTP Settings

The Smtp server settings for office 365  as followed: 

Server name:
User address:  User’s Office 365 address (for example, 
Port: 587 (with TLS) 
Encryption method: SSL/TLS
SMTP authentication: ticked
Authentication: Needed: your password
Sending limit: 10,000 emails/day

Read more: Gmail SMTP Settings: Meaning, Troubleshoot Problems & More

How to Find SMTP Server in Outlook 365

It must be confusing to find the SMTP server in Outlook 365, especially if you are doing it for the first time. Here's how you can do it:

  1. Log in to your email client webpage and click on the settings.
  2. Navigate the SMTP (Simple Mail Transfer Protocol) settings.
  3. The listed server address is your SMTP server address.

Office 365 SMTP Settings: Step-by-Step Configuration Guide

  1. Make a note of the public IP (static) address of the device you will use to send emails. Remember, dynamic IP addresses will not work. You can save or share it with your team for future references but we’d suggest not to share it outside of your organization. 
  2. Sign in to your Microsoft Office 365 account. 
  3. Now, select your domain. For instance, 
  4. Click on Manage DNS and look for the MX record. Now make a note of the POINTS TO ADDRESS value. Keep it for later. 
  5. Make sure the domain or device you will use to send is verified. Otherwise, your emails might get lost and you may not be able to track them. 
  6. Now, in Office 365, click on the ‘Admin’ button, and click on ‘Exchange’. 
  7. Click on ‘Mail Flow’ and then ‘Connectors’. 
  8. Finally, check the connectors list set up for your business. 
  9. You are done configuring Office 365 settings, now update the DNs record on your domain registrar’s website. Now, edit the SPF record. As you have kept a note of the IP address, include it now. If you skip this step, your emails might land on recipients’ junk folder or spam folder. 
  10. The last step consists of finding the entry for Smart Host or Server and entering the MX record Points to Address value. 
  11. You are done. Send a test email to check whether your recipient is receiving your email or not. 

Office 365 POP3 Settings

POP3 (Post Office Protocol 3) is an email retrieval protocol commonly used to access email from a remote server. When configuring POP3 settings for Office 365, it's important to note that it primarily focuses on downloading emails to a single device and may not provide the same synchronization features as IMAP. However, you can still set it up with specific SMTP Office 365 settings for outgoing mail.

SMTP settings for Office 365 helps you send emails through your email client. Here's the POP3 settings for seamless email receiving:

Server name:
Port: 995
Encryption method: SSL

Office 365 IMAP Settings

IMAP, or Internet Message Access Protocol, is a widely used email protocol that enables users to access their email messages from multiple devices while keeping them synchronized. When configuring IMAP settings for Office 365, it's essential to specify the correct SMTP address for Office 365 to ensure seamless email communication.

Now that you know that SMTP address for Office 365, let's look at the IMAP settings for Microsoft 365:

Server name:
Port: 993
Encryption method: SSL

Read more: All-in-one Guide to Zoho IMAP Settings

How to Configure Outlook for Microsoft 365?

  1. Once you have completed Office installations, go to the control panel/Outlook account profile.  
  2. Click on the Windows button and launch Outlook. 
  3. Choose a name for your profile. 
  4. Go to the advanced setup and click on Microsoft 365. 
  5. Add your official email address (e.g. and click on ‘connect’. 
  6. Choose an unique network ID (or, NetID) password. 
  7. Now, verify your identity through Duo multi-factor authentication. 
  8. Upon wizard configuration, Outlook will automatically connect your mailbox.  

The process is the same for MAC configuration. 


1. What is the SMTP server for Outlook?

The SMTP server for Outlook is and the SMTP port number is 587. 

2. How do I find my SMTP address in Office 365? 

Go to the Outlook homepage and on the ‘toolbar’ section, click on setting. Then go to Mail and click on PoP and IMAP. On that page, the SMTP server, POP3, and IMAP4 are listed on the settings page. 

3. How do I send an email through SMTP Office 365?

Use Direct send, Microsoft 365, or Office 365 SMTP relay to send an email using SMTP Office 365. 

If your device/devices fail to configure/meet the SMTP server settings for office 365, try to manage an on-premise SMTP server to send messages from your device to others. 

4. Is SMTP the same as IMAP? 

Nom SMTP and IMAP are two different things. SMTP is for sending emails, while IMAP retrieves emails. SMTP deals with the server only to send emails and IMAP, however, deals with both the client and the server to receive emails.

5. Why do I need to configure SMTP Settings in Office 365?

Office 365 SMTP settings configuration is essential for these following reasons:

  • SMTP settings are required to send emails from your Office 365 account. Without proper configuration, you won't be able to compose and send emails through Office 365 services.
  • SMTP settings include authentication information, which ensures that only authorized users can send emails from your Office 365 account.
  • SMTP server settings for office 365 helps route your messages through the appropriate servers and deliver them to the intended recipients.
  • You can customize your email sending preferences. For example, you can set a custom sender name or reply-to address, giving your emails a more professional attire.
  • SMTP settings allow you to use third-party email clients and applications with your Office 365 account.
  • SMTP settings configuration help you to send a large volume of emails using Office 365 as an SMTP relay.
  • When configured properly, SMTP settings can help troubleshoot email delivery issues.

6. Do I Need Authentication for Office 365 SMTP?

Yes, authentication is required for SMTP Office 365. When configuring SMTP for Office 365, you must provide valid credentials (username and password) to authenticate your email account. Additionally, ensure you use the correct SMTP address for Office 365, which typically follows the format "" This authentication step helps secure your email communications and ensures that only authorized users can send emails through Office 365's SMTP server.

7. Can I Use IMAP Instead of POP3 in Office 365?

Yes, you can use IMAP instead of POP3 in Office 365. IMAP allows you to access your emails on multiple devices while keeping them synchronized. To configure it, use the IMAP server settings for Office 365. Incoming mail server:, Port: 993, Encryption: SSL/TLS. Outgoing SMTP settings for Office 365:, Port: 587, Encryption: STARTTLS. Ensure you've enabled IMAP in your Office 365 account settings, and use your Office 365 email address and password for authentication. This setup enables you to seamlessly access and manage your emails across devices.

8. How Do I Test My SMTP, POP3, or IMAP Settings in Office 365?

To test your SMTP settings for Office 365, follow these steps:

  1. Access Outlook: Open Microsoft Outlook.
  2. Create a Test Email: Compose a new email.
  3. Recipient: Send the email to an external email address.
  4. Subject & Content: Add a subject and some content to the email.
  5. SMTP Server: Click on "Options" > "Show Bcc" > "From" and select your Office 365 account.
  6. Send: Hit "Send." If the email goes through, your SMTP settings are correct.

For POP3/IMAP, use similar steps in email clients, choosing the respective protocol, and using Office 365 server details.

9. How to find SMTP server in outlook 365?

Launch Microsoft Outlook 365 on your computer. Click on the "File" tab in the top-left corner of the Outlook window. In the File menu, select "Account Settings," and then choose "Account Settings" again from the drop-down menu. In the Account Settings window, you'll see a list of your email accounts. Select the email account for which you want to find the SMTP server settings and click on "Change." In the Change Account window, you'll find the SMTP server settings under the "Server Information" section. The SMTP server address is typically labeled as "Outgoing mail server (SMTP)." Write down or make note of the SMTP server address for your Office 365 email account.

10. Can I change SMTP, POP3, or IMAP settings after initial setup?

Yes, you can change SMTP, POP3, or IMAP settings after the initial setup. To update SMTP settings for Office 365 or adjust other email protocol settings, access your email client's account settings. Locate the relevant section (e.g., "Account Settings" or "Server Settings") and make the necessary changes. Ensure you have the updated server information provided by your email provider. Save the changes, and your email client will now use the updated settings for sending and receiving emails.

12. How can I modify the email client settings in Office 365?

To modify email client settings in Office 365, follow these steps:

  • Open your email client.
  • Navigate to the settings or preferences menu.
  • Locate the "Account" or "Email" settings.
  • Choose "Add Account" or "Edit Account."
  • Enter your Office 365 email address and password.
  • For SMTP settings, use the following:
  • SMTP Server:
  • Port: 587 (TLS) or 465 (SSL)
  • Authentication: Yes, use your Office 365 credentials.

Save the changes, and your email client will now be configured with the correct Office 365 SMTP settings.

13. What email clients are compatible with Office 365 configuration?

Email clients, including Microsoft Outlook, Apple Mail, Thunderbird, and mobile apps like iOS Mail and Android's Email app, are compatible with Office 365 configuration.

What’s a Rich Text element?

The rich text element allows you to create and format headings, paragraphs, blockquotes, images, and video all in one place instead of having to add and format them individually. Just double-click and easily create content.

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Static and dynamic content editing

A rich text element can be used with static or dynamic content. For static content, just drop it into any page and begin editing. For dynamic content, add a rich text field to any collection and then connect a rich text element to that field in the settings panel. Voila!

How to customize formatting for each rich text

Headings, paragraphs, blockquotes, figures, images, and figure captions can all be styled after a class is added to the rich text element using the "When inside of" nested selector system.

Author’s Details

Sattwik Das

Sattwik is a Digital Marketing professional at Smartlead. He is a dedicated content writer who focuses on juggling words to bring out meaningful content. He is experienced in well-researched and SEO-optimized content creation, content editing, and copywriting for various businesses throughout the globe. His expertise in SEO, SMM, and SMO with a touch of creativity helps businesses grow and maximize their credibility and sales.


Edited by:

Sattwik Das


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