On Friday I my iPad Air 2 gave the "user name or password is incorrect" error when I was attempting to send an email using my ISP (Verizon) based email. I hadn't changed anything and upon further review I found both the user name and password to be correct as we're both pop3 and smtp port settings. I can receive emails perfectly btw. So, I deleted the smtp port setting, re-entered them and was able to send the email but the next email I tried to send a few minutes later came back with the same error message. I again deleted and re-entered the smtp information and was able to send that email. This is the pattern where once I re-enter or recreate the smtp account I can send email once. It gets better. The problem is intermittent and it affects both my iPad Air 2 and, oddly enough, my desktop computer which is running Ubuntu Linux and Thunderbird for email. I can always go to the online Verizon email web page which works normally so I know it's not a user name or password problem because they both work every time there. Verizon did change it's smtp port from 25 to 465 a few years ago and going to SSL/TLS authentication which has worked fine till Friday afternoon. There it is, on two different devices, two different OS's where there have been no changes or updates to anything. It's an intermittent problem but when it's happening it's persistent for a few hours. I think it's a Verizon problem and will probably wait it out as I can go to their web page to check my email when it's happening. Anyone seen anything like this?