Roundcube plugin that displays a lock icon next to the subject line, showing the encryption state of an inbound mail
Alternatives To Roundcube_tls_icon
Project NameStarsDownloadsRepos Using ThisPackages Using ThisMost Recent CommitTotal ReleasesLatest ReleaseOpen IssuesLicenseLanguage
2 months ago1otherPython
A free & open modern, fast email client with user-friendly encryption and privacy features
7 months ago2otherC++
opmsg message encryption
2 days ago12agpl-3.0C
The DIME resolver library and command line utilities.
9 months agoJune 04, 20215mitGo
Golang SMTP server
2 months ago30otherShell
Convenient End-to-End Encryption for E-Mail
9 years ago1mitRuby
Secrets created by are kept until they are accessed, they are then deleted permanently from the server.
2 years agon,ullotherJavaScript
An unofficial desktop client for ProtonMail done with electron nativefier
a year ago93gpl-2.0C
:mailbox_with_mail: YAM (short for 'Yet Another Mailer') is a MIME-compliant open-source Internet email client written for Amiga-based computer systems (AmigaOS4, AmigaOS3, MorphOS, AROS). It supports POP3, SMTP, TLSv1/SSLv3 connection security, multiple users, multiple identities, PGPv2/v5 encryption, unlimited hierarchical folders, an ARexx interface, etc...
James Mime4j47
3 months ago1apache-2.0Java
Mirror of Apache James Mime4j
Uberspace Tools44
6 years agogpl-3.0Shell
Some tools for installing mailfilter, Let'sEncrypt-renewer etc. on an Uberspace 6 account
Alternatives To Roundcube_tls_icon
Select To Compare

Alternative Project Comparisons

Roundcube TLS Icon

Displays a small icon after the subject line that displays the (presumed) encryption state of received mails. This plugin parses the "Received" header for the last hop and checks if TLS was used. This requires TLS logging in the receiving MTA.

In Postfix this can be enabled by setting smtpd_tls_received_header = yes. Sendmail should work out of the box. Other MTAs have not been explicitly tested.

Note that while this talks about "encryption", this does not imply security. An encrypted mail may still be insecure, mostly because mailservers generally use "opportunistic TLS", where MITM attacks are possible. This also only validates the last hop of an email - some emails may run through multiple hops and we don't know anything about the security of these.

Inspired by roundcube-easy-unsubscribe

Example screenshot


The composer library name is: germancoding/tls_icon.

The plugin name to add to your config file is: tls_icon.


  • Roundcube 1.3.0 or newer.
  • PHP 5.4 or newer.

Currently supported languages

  • Dutch
  • English
  • French
  • German
  • Russian
Popular Mail Projects
Popular Encryption Projects
Popular Messaging Categories
Related Searches

Get A Weekly Email With Trending Projects For These Categories
No Spam. Unsubscribe easily at any time.