Thunderbird for Android - Instant push?

Hello, I've been with thunderbrid forever and am a big fan of your desktop version. Yesterday I tried thunderbird for Android beta. So far I need Bluemail on my Android phone and I would like to switch to thunderbrid. But I have a problem with Thunderbird for Android: With Bluemail I can send a mail and it arrives directly on my phone, so without much delay. With Thunderbird, it takes forever until I receive the mail. I could only set Thunderbird to synchronize every 2 minutes. With Bluemail I have an instant push setting, could this be the reason or where can I set Thunderbrid to inform me directly? I hope you can help me, thank you. Yes and the app is already very successful and fast and I hope that it will soon become my standard app. Best regards. Lukas