Download Email - Fast and Smart Mail 5.3.7_237_17082026 APK

Varies with device · Android 8.0+ · Updated Aug 17, 2026

File details for Email - Fast and Smart Mail 5.3.7_237_17082026
File name	email-fast-and-smart-mail-5.3.7_237_17082026.apk
File size	Varies with device
Package	com.fastsigninemail.securemail.bestemail
Requires	Android 8.0+
Category	Communication

How to install

Tap Start Download above and wait for the APK to finish downloading.
Open Settings → Apps → Special access → Install unknown apps, and allow your browser.
Open the downloaded file and tap Install.
Launch Email - Fast and Smart Mail from your app drawer.

APK files install on Android, not on Windows or macOS. Scan this code with your phone camera to open this page there, then tap Start Download.

Or type this address on your phone:

https://acknosoft.com/download/email-fast-and-smart-mail/?from=qr

"App not installed": Usually an older copy of Email - Fast and Smart Mail is still present with a different signature. Uninstall it first — including for other users on the device — then install again.
"Parse error": The file did not download completely, or the build does not match your device. Email - Fast and Smart Mail requires Android 8.0+; check that first, then download again on a stable connection.
Play Protect blocks it: Android warns about any app installed from outside the Play Store. That warning is about the source, not about this file specifically. Do not disable Play Protect — it is the check that catches genuinely malicious packages.
Not enough storage: Android needs roughly twice the download size free during installation. Clearing cached data usually frees more than deleting photographs.