Ping an external IP such as 1.1.1.1 and 8.8.8.8 to verify that you have Internet connectivity.Please perform the following steps to see if the issue is related to DNS: The most common reason you cannot browse the internet when connected to the VPN is a DNS configuration issue. My VPN is connected but I cannot browse the Internet, why? You can get help from server management service providers in case of any issues.General Troubleshooting Billing Passwords Privacy Windows macOS GNU/Linux iPad/iPhone Android Routers Media Players In general, the common cause for the occurrence of the error is inaccurate credentials. With this article, we explain the different causes for SMTP Error 535 Authentication Failed message and some easy methods to resolve the issue on your own. įor further assistance, you can contact your cPanel server support provider. Now you can select the Antirelayd checkbox.Navigate to WHM and select Service Configuration.For this purpose, you can follow the below method. Hence you may need to turn on the authentication on your own. In WHM, SMTP authentication is disabled by default. You can get connected to the Plesk server management service provider if you are struggling to fix the issue on your own.Įnabling the SMTP authentication in cPanel: Select the Relay Options and choose Enable SMTP services.Go to Tools & Settings and select Mail server Settings.Enable the SMTP authentication for the server-side and client-side.Įnabling the SMTP authentication in Plesk:.By blocking the IP address at the server’s firewall, you can prevent their attempt to log in again. Block the IP addresses that are consistently trying to log in to your account.Importantly, it is advised to change the credentials to a more secure one and also should remind them for your next login. Check the username and password provided to log in to your mail server.Generally, you will receive a notification if your account faces issues if any. Firstly, you should log in to your control panel and check your current account status.Methods To Resolve “SMTP Error 535 Authentication Failed” Message Even though IP-based authentication is considered to be an uncommon error, it can result in an SMTP error 535 authentication failed message. To resolve the disabled or expired IP-based authentication, you are requested to check the status of your account. If you have authentication methods that are not supported by your mail server, there are chances to show the SMTP error. If you have disabled this option, you might get an SMTP error 535 authentication failed message. You may have to enable the connection encrypted with SSL/TLS for some servers. Do connect with your server support team in case of any issues. Hence, you should ensure your account is active by checking the status of your account. A disabled account can be a reason for authentication failed message. Issues such as spamming and payment dues can make your account temporarily or permanently disble. You can contact your mail servers administrator if you need any further assistance. In this way, server security can be maintained. Some SMTP servers ask for a set of credentials that are different from your email account. Usually, everyone uses the same username and password as your email address to log in to your mail server. The “SMTP error 535 authentication failed” message may occur if you mistakenly enter the wrong username or password into your program. Some of the common reasons for SMTP error 535 authentication failed message are: In some cases, the server may not display any error messages. The server shows different error messages depending on the email program. If any inappropriate authentication is detected by the server, an error message is generated. To send the messages, the mail client uses Simple Mail Transfer Protocol (SMTP). Causes for “SMTP Error 535 Authentication Failed” Message With this blog, we would like to explain the different causes for the error and how our server engineers fix the “SMTP Error 535 Authentication Failed” message. If your mail server rejects the credentials you entered to the field of username or password, it will result in authentication failure.Īs a server management service provider, our technical support team gets a lot of queries to fix authentication failure errors. Generally, the error occurs when you fail to log in with the wrong user or password. It is more often to find an error of authentication failure on your server when you try to log in.
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