SimpleLogin is described as 'Open source solution to protect your personal email address. Generous free plan with uncapped bandwidth and infinite sends/replies, self-hostable, lot of powerful features, open roadmap, you can count on SimpleLogin to guard your email inbox' and is a very popular Anti-Spam tool in the security & privacy category. There are more than 100 alternatives to SimpleLogin for a variety of platforms, including Web-based, Google Chrome, SaaS, Mozilla Firefox and Android apps. The best SimpleLogin alternative is addy.io, which is both free and Open Source. Other great apps like SimpleLogin are AliasVault, Firefox Relay, MailDrop and TemporaryMail.
YOPmail’s free, quick and feature rich service guards you against spam, phishing and other online abuses. Protect your actual email, instead use YOPmail’s disposable one to sign-up wherever you want. YOPmail creates temporary inboxes of your choice instantaneously.
Spamgourmet provides disposable, optionally self destructing, email addresses that get created automatically the first time they are used, forward messages, and then automatically expire after number of specified messages received.
Burner Mail helps you protect your privacy by providing you with custom email addresses (burner emails) that can be used to forward all incoming emails to your personal account.
With Mailscribe, you can subscribe to newsletters with a separate email address, so your personal inbox stays clean. No more sifting through junk mail to find the emails you actually care about!
Mail Relay is Privacy Portal's email privacy service. It enables you to hide your personal email from third-parties, thus protecting your identity online and helping you reduce your digital footprint.
anon.li offers a unified privacy layer designed to protect your digital identity and data without compromising usability. The platform consists of two core open-source tools focused on secure communication and secure file sharing.
A free privacy focused temporary burner email alias service. Create disposable email addresses with customizable expiration times (15 minutes to 7 days), receive emails through unique tokens. No signups or other information needs to be provided.
Looking for a secure and hassle-free way to manage temporary emails? Evap Mail is the modern solution for instant, anonymous email addresses. Perfect for sign-ups, verifications, or online privacy, Evap Mail offers instant email generation with no registration required.
KeptlerMasking allows you to generate email masks, shielding your real address, blocking spam, and ensuring privacy. These masks discreetly forward messages, safeguarding your confidential email identity.
Inboxkitten is an open-source disposable email service that you can freely deploy adopt on your own!
Liechtenstein
Germany
EU
Singapore
It has all the features I was looking for including E2EE for labels.