

Downloading first on a platform email client does not prevent the second email client on the other platform to also be able to download the same email message. Note that POP3-downloading from an MTA different from Google works as I want it to. But if I use one platform (smartphone or desktop) to download Gmail message, then those message become immediately unavailable for the other platform MUA, even though all downloaded messages are left on the Gmail POP3 server (and show there as read). I also use a Linux / Thunderbird 102.8 MUA to do the same from a desktop computer. If you use Gmail through your work, school or other organisation, visit In the web address, replace with your domain name.I work with K-9 v6.400 on Android 8.1 to download my email from my Google POP3 and other POP3 servers on my smartphone. If the tips above didn't help, please visit and follow the instructions on this page.If you've recently changed your Gmail password, you might need to re-enter your Gmail account information or completely repeat your Gmail account setup on your other email client.Allow less secure apps: If you don't use 2-step verification, you might need to allow less secure apps to access your account.Use an app password: If you use 2-step verification, try signing in with an app password.Update your email client to the latest version.If you have these problems or can’t sign in, first check to make sure that you’re using the right password. You're asked to enter your username and password over and over.If you can't sign in to your email client, you might see one of these errors:

If you use Gmail with your work or school account, check with your administrator for the correct SMTP configuration.

Go to your client, such as Microsoft Outlook, and check these settings.
