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SMTP Error Code 550
SMTP is an email service protocol for delivering emails to the receiver. The SMTP error code 550 occurs when you try to send an email from the Outlook mail client.
Causes of the error 550:
- Step 1: If the email credentials of the recipient are incorrect, the SMTP error occurs on the client.
- Step 2: Such an error can occur when the email server settings are wrong or incomplete.
- Step 3: In case the email server is not operating or down, the outgoing mails do not get delivered.
Solutions for the SMTP error:
Check the email
- Step 1: Make sure to enter the correct email address of the receiver and check the domain name of the address.
- Step 2: Correct the email address and retry sending the email.
- Step 3: If you have a large-sized attachment on the email, then split it and send it in smaller sections.
Verify the server settings
- Step 1: Sometimes, having wrong server settings prevents emails from delivering, so open the Tools and Accounts menu in the Outlook application.
- Step 2: Select the View or Change option and then click the More Settings button in the Email Settings window.
- Step 3: Navigate to the Outgoing Server tab and check the authentication credentials.
- Step 4: In the Advanced panel, see if the incoming and outgoing server ports are correct and also verify the encryption type for the security option.
Disable Firewall & Security software
- Step 1: The firewall settings and the security software tool on the computer can block the mail service.
- Step 2: Turn the firewall settings and remove the antivirus tool or protection program on your computer, and send the email again.
Scan for malware
- Step 1: The Outlook email service stops if there is any virus or malware on the system.
- Step 2: In that case, perform a full scan on the system and find the location of the malicious program.
- Step 3: Use any virus removal tool to remove or erase the program on the system, and check the location of the program to confirm whether it is deleted. If you need a remote assistance to resolve SMTP error code 550, contact our technical experts.
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