*Unlimited* Disposable Email Aliases
(to vote for unlimited alias, visit https://protonmail.uservoice.com/forums/284483/suggestions/45394132)
Startmail explains it perfectly. They offer unlimited disposable aliases, which expire within a given amount of time. They also offer custom aliases which can be saved and used indefinitely.
It is the disposable alias which will help protect privacy, when submiting an email to an untrusted recipient. After all, how much privacy do we have if our fixed emails become the foundation for building and selling our marketing profiles, just as is done by gmail. We limit personal activity virtual trails by disposing of aliases for casual uses. But, unlike custom aliases, which build on our identifiable original email address, disposable aliases divert from our true email identity by utilizing a sub-domain created for this specific purpose, such as: xxx@tda.protonmail.com (tda = temporary disposable alias)
You avoid abuse by limiting disposable alias creation on a daily basis. Perhaps 5 max per day.
Here is Startmail's explanation:
https://support.startmail.com/index.php?/Knowledgebase/Article/View/3/0/aliases
The Blur service (by Abine) also offers a "masked mail" free service. But their service is not encrypted:
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Doctor Coffee commented
Yes please, that would be nice.
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AdminProton (Admin, Proton) commented
Alias (Disposable Email Addresses)