Dev Stack Source

Answer : As of current writing, it seems that it's (still) impossible to create a new label in Android Gmail app. From Google Gmail official support, Create a label On a computer, open Gmail. You can't create labels from the Gmail app. On the left, click More . Click Create new label . Name your label. Click Create . (Emphasis mine) If Inbox App is installed on the device and has access to Gmail ID, then from Inbox App, it is possible to create a Gmail Label, and the same will be SYNC to Gmail App. There is an option in Inbox App's Navigation drawer (sliding menu) to create new Gmail Labels. Not sure why the same is not made available in the official Gmail App itself, because the app is developed by the Gmail Team only. How I found I could create a new label on Android: Open Android Chrome. Invoke Gmail within Chrome (via that 3x3 grid selector), which opens the Mobile version of Gmail. Open an email & scroll to the bottom and you'll see: ...

Answer : I didn't try Matthew's solution but it seems the safer solution to try first. If that doesn't work though, I deleted the entire conversation from the outbox , having given up on trying to keep the conversation. I was surprised to find that this only deleted the queued message. The rest of the conversation stayed intact in my inbox. One way would be to clear the data for Gmail via the Settings app.

Answer : You need port 993 , the SSL IMAP port. Port 995 is the SSL POP3 port. I think Gmail's IMAP can only be accessed on port 993. $hostname = "{imap.gmail.com:993/imap/ssl/novalidate-cert}"; I had the same error and found a different solution. I have added debug info into host: "{imap.gmail.com:993/debug/imap/ssl/novalidate-cert}INBOX"; When I read php error log, I found Unknown: [ALERT] Please log in via your web browser: https://support.google.com/mail/accounts/answer/78754 (Failure) (errflg=1) in Unknown on line 0 Open link, and follow instructions. Search for Your app might not support the latest security standards. Try changing a few settings to allow less secure apps access to your account. Click on link and enable less secure app access. Then it works for me.