# Unable to Encrypt

**URL:** <https://community.ciphermail.com/t/unable-to-encrypt/250>\
**Category:** Gateway\
**Created:** [November 7, 2011, 10:26pm UTC](https://community.ciphermail.com/t/unable-to-encrypt/250 "2011-11-07T22:26:16Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![\_UxBoD](https://avatars.discourse-cdn.com/v4/letter/_/eb9ed0/32.png) [@\_UxBoD](https://community.ciphermail.com/u/_UxBoD)\
**Post date:** [November 7, 2011, 10:26pm UTC](https://community.ciphermail.com/t/unable-to-encrypt/250/1 "2011-11-07T22:26:16Z")

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Hi,

This is most probably a mis-configuration on my part but I am unable to encrypt outbound emails. I have generated an SSL email cert, via Comodo, and have imported it fine into Djigzo. I have set a Force Encrypt Signature and the cert is selected, inherited green, on the encryption certificate screen. Now when I send an external email I receive straight away an automatic email saying "The message could not be encrypted". What am I doing wrong ?

> **···**
>
> --  
> Thanks, Phil

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**Author:** ![Ronald\_Nissley](https://avatars.discourse-cdn.com/v4/letter/r/ec9cab/32.png) [@Ronald\_Nissley](https://community.ciphermail.com/u/Ronald_Nissley)\
**Post date:** [November 7, 2011, 10:44pm UTC](https://community.ciphermail.com/t/unable-to-encrypt/250/2 "2011-11-07T22:44:37Z")

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Phil,

Is the Comodo certificate for an external (to Djigzo) user? To send  
S/MIME-encrypted e-mail to an external user, Djigzo will need to have  
collected/harvested public keys for the external user/address. When you  
receive a signed (by external user's public key) e-mail, the Djigzo gateway  
captures and stores the public key. If you send an e-mail to an external  
user (for which Djigzo has captured a public key), your e-mail will be  
encrypted with the external user's public key. You can also manually add an  
external address/user and associated public key (assuming you've acquired  
this user's public key)

Hope that's helpful,

> **···**
>
> --  
> Ron
> 
> On Mon, Nov 7, 2011 at 5:26 PM, --[UxBoD]-- \<uxbod(a)splatnix.net\> wrote:
> 
> > Hi,
> > 
> > This is most probably a mis-configuration on my part but I am unable to  
> > encrypt outbound emails. I have generated an SSL email cert, via Comodo,  
> > and have imported it fine into Djigzo. I have set a Force Encrypt Signature  
> > and the cert is selected, inherited green, on the encryption certificate  
> > screen. Now when I send an external email I receive straight away an  
> > automatic email saying "The message could not be encrypted". What am I  
> > doing wrong ?  
> > --  
> > Thanks, Phil
> > 
> > \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_  
> > Users mailing list  
> > Users(a)lists.djigzo.com  
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