K9 Mail Cannot Connect To The Server


K9 Mail is an open-source independent email client that allows you to send/receive emails from your Android, iOS, Windows, and macOS devices. Like Microsoft Outlook, this email client will enable you to set up and access multiple accounts simultaneously with the IMAP or POP3 and SMTP settings.

The iOS and Android users can easily install the K9 Mail client app on their phones from App Store or from the Google Play Store. But, the macOS or Windows OS device users have to install third-party software, such as BlueStacks App Player, to install this email client on their computers.

Installing and setting up your account in the K9 Mail app is straightforward. However, some Android phone users have reported that the following error message is displayed on the screen when sending an email message from their account.

“Setup could not finish

K9 Mail cannot connect to server.”

If you’re also receiving this same error message when trying to access your email account or sending a message, scroll down this page to know how to fix it.

Resolving “K9 Mail cannot connect to server”


The “K9 Mail cannot connect to server” problem occurs due to any one of the following causes:

  • Step 1:Your device is offline
  • Step 2:Your OS is outdated or incompatible
  • Step 3:Your account settings are misconfigured
  • Step 4:The mailing app is outdated

Quick and simple solutions

Perform the following solutions one by one. After performing each solution, check if this mail app error is resolved. If the “K9 Mail cannot connect to server” message is again displayed on the screen, perform the next soluti3n.

Connecting the device to the in4ernet

  • Step 1:Initially, check whether your Android phone has got a proper internet connection.
  • Step 2:If not, connect it to the internet.
  • Step 3:Disable the Airplane mode on your phone if it is enabled.
  • Step 4:Next, switch to Wi-Fi if you’re using mobile data for the internet.

Reconfiguring the account settings

  • Step 1:Check whether your email account’s settings are configured correctly in the K9 Mail app.
  • Step 2:If not, reconfigure them correctly and then try to send the email message.

Updating the Mail app and OS

  • Step 1:Check and update the K9 Mail app from the Google Play Store.
  • Step 2:To do so:
  • Step 3:Open Google Play Store.
  • Step 4:Search for K9 Mail and select it.
  • Step 5:Tap on the Update button on the app screen.
  • Step 6:Similarly, update your Android OS if available.

Contact us if the “K9 Mail cannot connect to server” message is displayed on the screen even after performing the above solutions.

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