I have hit some obstacles trying to use K-9 app on my Pixel phone running Lineage OS.
- With gmail I get error message - Username or password incorrect, invalid credentials. Needless to say that my log in details are for sure correct. I went under my gmail security settings and turned ON “less secure app access” and that did not help.
- With yahoo email I get a server issue message: set up could not finish : cannot connect to server. Here is what I have showing on the phone: IMAP server: imap.yahoo.ca, Security: SSL/TLS, Port:993
If anybody has any insights on this, I would greatly appreciate this. Thank you!
For GMail, you’ll probably need to set up an app-specific password. This is the case if you have any sort of two-factor authentication enabled on your account.
For Yahoo, the correct hostnames and ports are listed here:
Thank you Zootboy for assisting with this! Concerning gmail - the two factor authentication is disabled. I already checked. Concerning Yahoo - I have already followed similar links. I can only get as far as “incoming”, and all the information is the same as per instructions. Anything pass that point, I get error message “set up could not finish” Cannot connect to server. Your help is appreciated
GMail also requires IMAP access to be enabled in its settings. In addition, you may need to use an app-specific password even if 2FA is disabled. Google has been moving to “lock down” password-only access methods as of late.
As for Yahoo, you might try both the STARTTLS and SSL/TLS options on both listed ports to see if one of those combinations works. Their page is a little ambiguous, but 587 is typically STARTTLS and 465 is typically SSL/TLS.
I had a similar problem with gmail : “Authentication plain NO” while the password was good.
I enabled 2FA and created an app password. K9-mail worked again.
Then I disabled 2FA and entered my password.
For now, K9-mail is still working.
Zootboy, you can’t use an app password if 2FA is disabled. The option is not available.
I have the same problem on Gmail. I fix activating the access IMAP on POP/IMAP configuration (https://mail.google.com/mail/u/0/#settings/fwdandpop) and allowing access to less security app on account’s configuration > security (https://myaccount.google.com/security?gar=1)
Doesn’t Google now require TLS v1.3?
And, K9 support only up to (and including) v1.2?