Message status remains sending

Hi, having problems when sending messages to my service provider eg. Balance check. Message status remains 'sending'.

Am suspecting i have some invalid setting however not sure which. This used to work fine until recently and my service provider confirmed that set up from their end is enabled correctly.

Any help would be great!

bluetooth keyboard not sending Meta key to apps

i connected my bluetooth keyboard to my device.. and all keys work....
except Meta (command) key... when i press it opens.. Complete action with Nothing/search..... and doesnt send the keyevent to apps...

i checked keyboard scancode and qwerty.kl... there is no action associated with it.. so is the action baked in rom?

Sending a text using "OK Google"

If I say "Ok Google.. Send text to bob... blah blah blah" it will send it using my carrier number not my google voice number but if I go into hangouts and send a text it sends it using my google voice number. Is there anyway to fix that? Also the default sms app in settings is hangouts and I am using the nexus 5 lollipop and I don't have any 3rd party sms app at all.

Sending Email from My Email address

I am a beginner to Android development. I just started making an Android app in which there multiple EditText fields where user would fill in some data and then click a button. On button click I need to send an email using my email address which is GMail (NOT THE END USER'S). So, I searched on internet for this, found a way by using "JavaMail" API. But I had to "Enable access to insecure apps", in Google settings of my GMail address for it to work. I don't want my end users to grant access to their email accounts.
I searched for OAuth2 implementations but all were there for using the end user's account to send email.

Help me to find a way to send email from my own GMail account without enabling insecure apps for my GMail.

If you need any more information let me know.