Outlook SMTP Settings | Complete Guide

Outlook SMTP settings

Is your Outlook SMTP settings to misconfigured? Or are you setting it up for the first time?

Anyways, if you are searching for the accurate SMTP settings for Outlook, then you have reached the right place.

Setting up your email in Outlook correctly makes sending and receiving messages easy and safe. 

This guide will help you understand how to configure your Outlook SMTP settings. No tech jargon or hassles – follow our simple steps and watch your email communication work seamlessly.

Here it goes if you are looking just for the basic Outlook SMTP setting.

Outlook SMTP settings

Copy the SMTP Server and other details.

If you want to know more about Outlook SMTP settings, keep scrolling.

How does Outlook SMTP, POP & IMAP work?

SMTP(Simple Mail Transfer Protocol) ensures your outgoing messages’ secure and reliable delivery. 

Outlook SMTP settings

POP (Post Office Protocol) acts as your personal mailbox attendant, fetching incoming emails from the server and placing them directly into your Outlook inbox.

Outlook SMTP settings

IMAP (Internet Message Access Protocol) allows seamless access to your messages across multiple devices.

Outlook SMTP settings

How to find SMTP settings in Outlook?

The other question you’d have is how to change SMTP settings in Outlook.

Adding accurate SMTP settings in Outlook is necessary to configure your email account and ensure seamless outgoing email communication. Here’s how you can find or change the SMTP settings in Outlook:

Step 1:
Open Outlook mail & sign into your account. 

Step 2:
Click the ‘Settings’ button in the top right corner.

Step 3:
On the search bar, type ‘POP.’

Outlook SMTP settings

Step 4:
Select the POP and IMAP options.

Step 5:
Under the ‘POP Options’ section, select ‘yes’ for ‘Let devices and apps use POP’.

Outlook SMTP settings

Note: Check the server settings. 

outlook smtp setting

What are SMTP, POP & IMAP settings for Outlook?

Outlook SMTP Settings

SMTP Server: smtp.office365.com
Port: 587
Requires SSL: Yes
Requires TLS: Yes 
Authentication: Yes 
Username: Your full Outlook email address
Password: Your Outlook password 
Sending Limits: 300 emails a day or 100 recipients a day

Outlook POP3 Settings

POP Server Address: outlook.office365.com
POP Port: Typically 995 
Encryption Method: SSL/TLS 
Authentication: Yes

Note: With POP, emails are typically downloaded to your local device and removed from the server unless you specifically configure it to leave a copy on the server.

Outlook IMAP Settings

Server Address: outlook.office365.com
Port: 993 
Encryption Method: SSL/TLS 
Authentication: Yes

Note: IMAP allows you to access your emails on multiple devices, which remain on the server, synced across all devices.

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Outlook SMTP Settings: Issues Troubleshoot

Why am I unable to send emails using Outlook?

Possible Causes and Solutions:

  • Incorrect SMTP Settings: Double-check the SMTP settings:
    • SMTP Server: smtp.office365.com
    • Port: 587
    • SSL/TLS: Enabled
    • Authentication: Enabled
    • Username and Password: Correct and matching your Outlook email credentials.
  • Internet Connection Issue: Ensure you have a stable internet connection.
  • Firewall or Antivirus Interference: Check if your firewall or antivirus is blocking outgoing emails. Add Outlook to the whitelist if needed.

Why are my emails stuck in the Outbox in Outlook?

Possible Causes and Solutions:

  • SMTP Authentication Missing: Ensure authentication is enabled in the SMTP settings.
  • Large Email Attachments: Reduce the size of email attachments and try sending again.
  • Offline Mode: Ensure Outlook is not in offline mode (check the status bar).
  • Outgoing Server Delay: Restart Outlook and resend the email.

Why do I keep getting an “Authentication failed” error?

Possible Causes and Solutions:

  • Wrong Username/Password: Re-enter your Outlook email and password.
  • Two-Factor Authentication (2FA) Enabled: If 2FA is enabled on your Outlook account, use an App Password generated from your Outlook account settings.
  • Account Locked: Check if your account is temporarily locked due to unusual activity and follow the steps provided by Microsoft to unlock it.

Why are my sent emails not being delivered?

Possible Causes and Solutions:

  • Exceeded Sending Limits: Outlook’s SMTP server limits are:
    • 300 emails/day or 100 recipients/day.
    • Wait 24 hours and try sending fewer emails.
  • Spam Filters on Recipient’s Side: Ensure your email content does not trigger spam filters. Avoid spammy words or excessive links.
  • Incorrect DNS Settings: Ensure your domain’s SPF, DKIM, and DMARC records are correctly configured to improve deliverability.

Why can’t I find the SMTP settings in my Outlook account?

Possible Causes and Solutions:

  • Navigation Issue: Follow these steps:
    1. Open Outlook and log in.
    2. Click on the settings (gear icon) in the top right corner.
    3. Use the search bar to find “POP and IMAP settings.”
    4. Locate the SMTP settings under the IMAP/SMTP section.

How can I fix SSL/TLS connection errors in Outlook?

Possible Causes and Solutions:

  • Incorrect Port Number: Ensure the correct ports are used:
    • SMTP: 587 (TLS) or 465 (SSL)
    • IMAP: 993 (SSL)
    • POP: 995 (SSL)
  • SSL Certificate Issue: Update or repair your SSL certificate if you’re using a custom domain.
  • Outdated Outlook Version: Update Outlook to the latest version for compatibility with secure connections.

Outlook SMTP Settings: FAQs

What is the SMTP code for Outlook?

The SMTP server for Outlook is “smtp.office365.com”. It requires TLS encryption and typically uses port 587 for outgoing mail.


Where are SMTP settings in Outlook?

Find SMTP settings in Outlook by navigating to File > Account Settings > Manage Profiles > Email Accounts. Select your account, then click Change to view or update SMTP details.


Should I use port 25 or 587 for SMTP Office 365?

Use port 587 for SMTP Office 365 with TLS encryption. Port 25 is traditionally used for relaying but may be blocked by some ISPs.


How to configure Outlook manually?

Manually configure Outlook by selecting File > Add Account > Manual setup. Enter your email address, select IMAP/SMTP settings, and input server details like “smtp.office365.com” for SMTP and “outlook.office365.com” for IMAP.


How do I fix my Outlook email settings?

Fix Outlook email settings by going to File > Account Settings > Manage Profiles > Email Accounts. Review and correct incoming/outgoing server details and ensure the correct port numbers (IMAP: 993, SMTP: 587).

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