Different Solutions to Fix Error 550 in MS Outlook

Outlook error 550 mainly arises when you are trying to send a mail through Outlook account. When you send a mail, it will not get delivered and returns 550 error message. Error 550 may appear like this-

“550 Requested action not taken: mailbox unavailable”

“550 5 2 1 mail from refused spam site”

Main Causes for Error 550-

1. PST file corruption

2. Wrong email address

3. Improper SMTP Server settings

4. Internet Service Provider limitations for outgoing emails on the email server

Fixes for Outlook Error 550: -

Solution 1: Enter Correct Email Address

If you enter a wrong email address while sending emails, you may get this 550 error. So, ensure that you have entered the correct password. If you have typed wrong email address, then change it.

Solution 2: Correct SMTP Server Settings

At times, you will get error 550 due to incorrect SMTP Server settings. To resolve this, opt the below-mentioned steps-

• Open Outlook and then go to Tools-> Account option
• Now, navigate to View/Change email account
• Ensure that SMTP server is set to mail.yourdomain.com.
• Then click More Settings and then go to Outgoing Server tab
• Make sure that ‘My server requires authentication for the outgoing server’ is checked.
• Then click on Confirm Changes

Now, resend your mail. If problem still persists, try out the next method.

Solution 3: Contact ISP

Sometimes, ISP put restrictions on SMTP email services, if junk email volumes increase. To remove these restrictions, you have to contact your respective ISP.

Solution 4: Repair Corrupted PST File

If you are encountering error 550 due to damaged PST file, then fix it using Remo Repair Outlook software. Remo PST Repair tool helps in fixing damaged PST file due to which you are getting error 550 while sending emails. It just extracts the content from damaged PST file and creates a healthy PST file with the extracted content of damaged PST.

Guide to Repair PST File:

Download Remo Repair Outlook PST software on your system and install it by following on-screen instructions.

Step 1: Run the software and select any of the 3 options from the main window.

"Open PST File" option if you know the exact PST file location

"Find PST File" option to search for the corrupted PST file

"Select Outlook Profile" if there are multiple Outlook profiles.

Step 2: Choose the right scanning method and browse for the destination. And hit "Next" button.

Step 3: After completion of PST file repair, you can preview the repaired PST file along with all Outlook attributes like emails, notes, contacts, tasks, journals, etc.

Other Benefits of Remo Repair Outlook PST Software-

• Recovers deleted Outlook attributes, such as emails, journals, tasks, contacts, calendars, etc.
• Fixes Outlook error 0X800CCC81, 0X800CCC0f, 0X800CCC78, 0X800CCC1A, and all other errors related to Outlook PST file.
• Helps to recover emails along with its attributes
• Easily repairs password protected and compressed PST file
• Repairs PST file created using any Outlook version, including Outlook 2016