# Android S/MIME

**URL:** https://community.ciphermail.com/c/android-smime/8.md

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## [About the Android S/MIME category](https://community.ciphermail.com/t/about-the-android-s-mime-category/780)

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**Author:** [@system](https://community.ciphermail.com/u/system)\
**Replies:** 0

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General discussions about the use of and experiences with CipherMail S/MIME app for Android. Creating a topic Add as much information as possible but keep it relevant. When reporting a bug, try to explain step-by-step …

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## [Send SMTP Mail fails with Error 'Unknown"](https://community.ciphermail.com/t/send-smtp-mail-fails-with-error-unknown/1036)

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**Author:** [@sirtet](https://community.ciphermail.com/u/sirtet)\
**Replies:** 0\
**Last updated:** [November 29, 2025, 8:36pm UTC](https://community.ciphermail.com/t/send-smtp-mail-fails-with-error-unknown/1036 "2025-11-29T20:36:37Z")

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Thanks for this App. A little feedback: I struggled with the setup, because of a cryptic error message, would be nice to improve that: When i first tried to send a Message, after entering the Keystore password, the A…

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## [Gmail opaque fails to Gmail address/ thunderbird](https://community.ciphermail.com/t/gmail-opaque-fails-to-gmail-address-thunderbird/957)

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**Author:** [@MANICX100](https://community.ciphermail.com/u/MANICX100)\
**Replies:** 0\
**Last updated:** [November 13, 2024, 11:16am UTC](https://community.ciphermail.com/t/gmail-opaque-fails-to-gmail-address-thunderbird/957 "2024-11-13T11:16:59Z")

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I used to use iOS and S/MIME the default mail client worked perfectly with S/MIME and I could send to gmail and it would under message dropdown show green tick for S/MIME verfied. Now I use android and using cipher mail…

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## [Attachment renamed by the app](https://community.ciphermail.com/t/attachment-renamed-by-the-app/826)

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**Author:** [@wrdlbrnst](https://community.ciphermail.com/u/wrdlbrnst)\
**Replies:** 4\
**Last updated:** [February 16, 2023, 4:21pm UTC](https://community.ciphermail.com/t/attachment-renamed-by-the-app/826 "2023-02-16T16:21:51Z")

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When attaching a document in android and sending the message in the app, the document is renamed by the app using the stored path on android. E.g.: test.pdf saved in “downloads” is renamed to “primary%3ADownload%2FTest.p…