Concern

This evening someone tried to send me a mail purporting to come from emails @avast.com the title of which was " your backups will be deleted by October 19th. This did not make it onto my system as I use Mailwasher which stopped it at its server. I deleted it due to the recent issues surrounding CCleaner. Should I be concerned at this mail, is it Malware or a genuine information message from Avast and if so why.

hitbit

I believe thought it's for android backup program, I've been getting them too

It's about 'Avast Mobile Backup' which was discontinued in July 2016.

https://www.avast.com/faq.php?article=AVKB53