Email clients
Sylpheed privacy rating
Lightweight GTK email client for Linux, Windows and macOS with POP3, IMAP and SMTP support, junk mail filtering and GnuPG encryption.
Summary
Sylpheed scores 72 out of 100 (grade C) on the email clients criteria. It meets 6 of 8 criteria: open source, no ads or data sales, OpenPGP support, connects directly, blocks remote content and works with any provider. It does not meet no trackers or telemetry and independent audit.
Score 72 out of 100. How scoring works
Criteria
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Yes
Open source Weight 3 of 3
Is all the source code needed to run the product public?
GPL-2.0, with the LibSylph library under LGPL.
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No
No trackers or telemetry Weight 3 of 3
Are the website and apps free of third-party trackers, with any analytics anonymous and any telemetry off by default?
The application has no telemetry, but the website loads Google Analytics.
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Yes
No ads or data sales Weight 2 of 3
Is the product funded without advertising, ad targeting or selling user data?
Free software. No ads.
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No
Independent audit Weight 2 of 3
Has an independent security or privacy audit been published within the last three years?
No independent audit is published.
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Yes
OpenPGP support Weight 2 of 3
Can the app encrypt and sign mail with OpenPGP, built in or through an official add-on?
Signing and encryption with GnuPG are built in.
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Yes
Connects directly Weight 3 of 3
Does the app connect directly to your mail server, without passing mail or passwords through the vendor's servers?
Connects directly to POP3, IMAP and SMTP servers. No vendor service is involved.
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Yes
Blocks remote content Weight 2 of 3
Are remote images and tracking pixels blocked by default?
HTML mail is converted to plain text for display, so remote content is never loaded.
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Yes
Works with any provider Weight 1 of 3
Does the app work with any standard IMAP and SMTP provider?
Works with any POP3, IMAP and SMTP provider.