Mail Blog
News, engineering insights, and privacy updates from the Aster team.
How to split a large MBOX file
Google Takeout hands you one giant MBOX file, often several gigabytes. Here is how to split it into import-ready pieces with Thunderbird and ImportExportTools NG, step by step, without your mail ever leaving your computer.
How to use categories and custom categories
Aster Mail can sort your inbox into tabs like Primary, Promotions, Social, and Updates, and let you build custom categories that match mail by sender domain or subject keyword. Here is how to set it all up, and why the sorting never leaves your device.
How to import your email into Aster
Moving to Aster does not mean leaving your old mail behind. Here is how to bring it over, either with a one-click connection to Gmail or Outlook, or by importing a file yourself.
Can I change my username?
Your Aster username is permanent because it is also your email address and encryption identity. Here is why it cannot be renamed, and the two reliable ways to end up with the name you want.
What happens when your subscription ends
A plain explanation of what changes the moment your paid plan ends. What we keep, what gets paused, what you can still do, and how to get back where you were without losing anything.