Thanks for the SSL explanation. After accepting the SSL key, K-9 does not prompt any more.  I recommend including explanation on websites so users will not worry about K-9 warning. thanks.

Thanks for explaining vmail. Ebay was the only company to reject my emails, so I wont use with Ebay.

Thanks offering squirrelmail to give option to disable javascript to make us safer. Squirrelmail website works very well using opera or firefox for android. Roundcube does not. I cannot open emails.

I have several android devices. Everytime I set up my email account, K-9 reports : "Unrecognized Certificate. The server presented an invalid certificate." Should K-9accept the key anyway?

The emails I am sending from my ruggedinbox.com account were rejected by a company because they didn't come from my registered email account. The emails I sent came from vmail@ruggedinbox.com. Is my account hacked? Do I need to close it?

I read about ruggedinbox in \r\privacy subreddit of reddit.com. Thank you for providing such a private email client.  

I have an android 2.3.4 phone and android 4.4.2 tablet. Opera Classic browser and Firefox 34.0.1 browser can render ruggedinbox.com website. However, orweb browser and lighting browser cannot.  Lighting browser error message: "Website not available."  Orweb's error message: "Website not available."  Are other users getting these error messages?