A new one I just heard about.. https://disroot.org

The project is based in Amsterdam, was founded by Muppeth and
Antilopa in 2015, it is maintained by volunteers and relies on
the support of its community.

Mailbox size limit: 1 GB
Attachement size limit: 64 MB

One particular feature..

Delimiters: You can use delimiters (plus sign, "+") in your
email address to create sub-addresses, like
username+whatever@disroot.org, for example for filtering and
tracking spam. Example: david@disroot.org can set up mail
addresses like 'david+bank@disroot.org' that he could give to
his bank. It can be used only to receive emails, not to send
ones. Your emails will always be sent as david@disroot.org.

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