I use GMvault for doing this and I'm quite happy with it. Unfortunately, it's not actively maintained anymore and out of the box, it doesn't work properly thanks to some annoying changes that Google has made to Oauth, but fortunately, there's plenty of documentation on GitHub for how to fix it. I have GMvault set up to run nightly using a cron job on my NAS. Source: about 1 year ago

With gmvault you can download and sync. http://gmvault.org/ it saves in .eml format, I assume you could use a locally installed web mailer for accessing the emails? Source: about 1 year ago

I used this until I didn't need it any more, worked perfectly for a long time: http://gmvault.org/. Source: about 1 year ago

I recommend to look in gmvault http://gmvault.org/ . Source: about 2 years ago

It's a good idea to use something like gmvault [0] to ensure you have regular downloads of your mail corpus locally. [0] http://gmvault.org/. - Source: Hacker News / about 2 years ago

Implementing email authentication solutions like DMARC with an enforced policy is proven to drastically minimize the chances of BEC. You can learn about DMARC here: https://powerdmarc.com. Source: almost 3 years ago

Stop attacks with DMARC and protect your email service free from email spoofing Phishing PowerDMARC tool. Monitoring SPF DKIM, DMARC Record, BIMI MTA-STS TLS-RPT. Visit the website and Get a free real time email authentication assessment for your organization. Source: about 3 years ago

You can try https://powerdmarc.com it starts from 8 usd a month, you get the DMARC analyzer along with MTA-STS and TLS-RPT. Source: over 3 years ago