{"id":3299,"date":"2024-07-01T08:06:23","date_gmt":"2024-07-01T08:06:23","guid":{"rendered":"https:\/\/myemailverifier.com\/blog\/?p=3299"},"modified":"2024-07-03T08:22:02","modified_gmt":"2024-07-03T08:22:02","slug":"how-to-fix-error-535-authentication-failed","status":"publish","type":"post","link":"https:\/\/myemailverifier.com\/blog\/how-to-fix-error-535-authentication-failed\/","title":{"rendered":"How To Fix Error 535: Authentication Failed\u00a0"},"content":{"rendered":"

Introduction<\/b><\/h2>\n

Authentication failed errors commonly occur on servers when incorrect username or password details are inputted at login. The mail server rejects the wrong credentials, which results in this error.<\/span><\/p>\n

Basically, we are a server management service provider and often receive queries to address authentication failed errors. This post is going to explain the reasons behind these errors and our server engineer\u2019s method of fixing an \u201cSMTP Error 535 Authentication Failed\u201d message.<\/span><\/p>\n

The reasons behind an \u201cSMTP Error 535 Authentication Failed\u201d message<\/b><\/h2>\n

Email clients use Simple Mail Transfer Protocol (SMTP) to send messages. If the server detects incorrect authentication, then it generates an error message of authentication failed. Different email programs will display diverse error messages, while others may not show any at all.<\/span><\/p>\n

Common causes for SMTP error 535 authentication failed messages include<\/strong><\/p>\n

Wrong Username or Password<\/span><\/h3>\n

If you accidentally enter an incorrect username or password, then you will likely see the SMTP error 535 authentication failed message. Most users use their email address as their username and password for their mail servers.<\/span><\/p>\n

In some cases, SMTP servers request different login details from your email account in order to ensure security. If you need help with this, then get in touch with your mail server administrator.<\/span><\/p>\n

By improving the quality of email authentication, increasing\u00a0email delivery rates<\/a>, and reducing spoofing attempts, an organization can enhance the reputation of its brand<\/p><\/blockquote>\n

Disabled Account<\/span><\/h3>\n

Spamming issues and unpaid debts can result in your account being temporarily or permanently disabled. A disabled account can be another reason for receiving an authentication error message, so make sure your account is active by confirming its status. You should reach out to your support team if you experience any server issues.<\/span><\/p>\n

Encrypting Connections<\/span><\/h3>\n

Because some servers need an SSL\/TLS encrypted link, you may need to activate this. If it’s turned off, then you could get an SMTP error 535 message for authentication failed.<\/span><\/p>\n

Authentication Technique<\/span><\/h3>\n

Error messages might appear if your email server doesn’t support your authentication methods. So, to fix expired or deactivated IP-based authentication<\/strong><\/a>, check the status of your account. Although rare, IP-based authentication errors can lead to an SMTP error of 535 messages for authentication failure.<\/span><\/p>\n

How to Fix “SMTP Error 535 Authentication Failed”<\/b><\/h2>\n