K9 is a free, open-source email client that allows you to configure and access an email account on your smartphone or laptop/desktop. It’s easy to use and comes with some great features like a unified inbox, bug fixes, message list, and more. Even if this email client is compatible with almost all the email service providers, the “Authentication failed” message was displayed on the screen when I tried to configure my Gmail account with it.
However, I managed to fix it by performing some basic troubleshooting solutions. If you’re also receiving the authentication failed message with Gmail, continue reading this page to know how to fix K9 Mail Gmail Authentication Failed.
Configuring the account settings correctly
In most cases, misconfigured account settings will lead to these problems. So, as the first step of troubleshooting the “authentication failed” problem, check whether your Gmail account settings, such as username, password, IMAP, and SMTP details, are entered correctly in the given fields. If not, enter them correctly.
The Gmail service uses the IMAP settings to receive emails. So, when you face the authentication failed problem, check whether the IMAP setting is enabled on your Gmail account. If not, enable it and then try to access your account. Carry out the simple and quick instructions given below to check and enable the IMAP setting on your Gmail account.
Creating and using an app-specific password
If you see the “Gmail authentication failed” message again in K9, check whether you have enabled two-step verification on your account. If yes, then create and use an app-specific password for your account. To do so, follow the instructions below.
Now, try to configure the Gmail account in K9. When prompted, type the app-specific password in the given field.
Contact us if none of the solutions fix the K9 Mail Gmail Authentication Failed.
In order to prevent third parties from reading your mail content, email encryption is done, which is basically digitizing the information within.
There are not many ways to prevent spam from piling up in your Inbox. Here’s how you can filter out most of them.
AT&T Email error 0x800CCC0F occurs when mails are not being sent or received through AT&T services. Due to the technical glitches causing it, many email functions are disabled. The computer’s Operating System might get frozen.