CipherMail Email Encryption

CipherMail Email Encryption


(4 stars)


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10,000 - 50,000 downloads

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CipherMail for Android is an Android application which can be used with your existing Android mail application to send and receive S/MIME digitally signed and encrypted email with an Android smartphone.


- S/MIME 3.1 (X.509, RFC 3280), email encryption and digital signing
- Can be used with the Android Gmail application
- Compatible with existing S/MIME clients (like Outlook, Thunderbird etc.)
- Message and attachments are encrypted
- HTML email support
- Certificates are automatically extracted
- CRLs supported (LDAP and HTTP)
- Certificate trust lists (CTLs) for black/white listing certificates
- LDAP servers can be searched for certificates
- Can generate self-signed certificates for a 'private-PKI'


- CipherMail for Android does not provide functionality to retrieve email. An existing Android mail application, for example Gmail, K9 or the default Android email client, should be used to retrieve the encrypted attached smime.p7m message.
- Clear signed digitally signed message can only be verified by opening the message as an .eml file from the sdcard. The complete message is required for validation. Existing mail clients however do not provide access to the complete message.


- The GET_ACCOUNTS permission is required to get the default sender address
- The READ_CONTACTS permission is required to lookup the recipients for the compose page


- Quick start guide
- Reference guide

For more information see

For support contact us at

Feedback on some reviews:

CipherMail is fully functional and has been tested on the Galaxy tab despite Mr Croucher negative and false claims. The reason he could not import the keys was that he didn't understand the difference between private keys and certificates and kept on trying to import a .pfx file with the certificate import wizard (which is only for importing certificates, not keys).

Paula reported that she couldn't find any certificates. CipherMail cannot "automagically" find all externally used certificates. There are three ways to get certificates for recipients: extracted from digitally signed email, manual import or, a certificate can be downloaded from an LDAP server.

About the integration of CipherMail and email clients. CipherMail registers itself as an application to handle S/MIME attachments (smime.p7m). If a mail application can download the smime.p7m attachment, it can be decrypted by CipherMail. Most Android email clients cannot be extended by external apps. Improved integration between existing email clients and CipherMail can only be done if the email client supports plugins.

About CipherMail:

CipherMail (formerly known as DJIGZO), based in Amsterdam, the Netherlands, provides products for the protection of email. CipherMail Email Encryption Gateway is an open source centrally managed email server that encrypts and decrypts email at the gateway level.

Installation packages are available for Ubuntu, Debian, Red Hat, CentOS etc. A free ready to run Virtual Appliance for VMware and Hyper-V is available.

Tags: djigzo s/mime email encryption, smime, s/mime signed email, s/mime, smime email, s/mime google, ldap lookup s/mime, mail s/mime, gmail s/mime, s/mime email protection.

Recently changed in this version

- The certificate list can now be filtered with a search string
- Some GUI clean up
- The SMTP user agent was renamed to CipherMail
- Certificate details view tries to find the certificate issuer even if a valid chain cannot be built

Comments and ratings for CipherMail Email Encryption
  • (61 stars)

    by William Sagaberd on 12/04/2015

    Never got it to function.

  • (61 stars)

    by Clotaldo Rivera Jr on 03/04/2015

    Too technical and complicated; should be more user friendly.

  • (61 stars)

    by dru d on 02/04/2015


  • (61 stars)

    by Ghi Hin on 23/09/2014

    No instructions on how to do anything. Unable to encrypt a message. Unable to create a key. What is my password as I never created one, but you require it? In its present form, the software is useless.

  • (61 stars)

    by Peter Gonzalez on 11/08/2014

    You go to Settings>>Account>>Select Signer. You then have to choose Import Keys. Originally I selected Import Certificates but it only looks for certificates with the following extensions (*.cer, *.crt, *.p7b, *.pem and *.der). Selecting Import Keys allows it to find the Comodo certificate which is a *.pfx format. It works.

  • (61 stars)

    by Nicolai Lazarov on 29/07/2014

    Convenient to use. Scilent

  • (61 stars)

    by Marquise Richardson on 28/06/2014

    The interface really needs a redesign, I also changed the paraphrase timeout and it often resets back to 60 seconds. After a message is sent it should go back to the main screen not stay in compose.

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