I have three different e-mail accounts I use with Outlook 2010. I have CSE certificates for all three and believe I have installed them all in the same way. Two of them work fine, but the last will not let me reply to mails send to that account. I get the following message “The operation failed. The messaging interfaces have returned an unknown error. If the problem persists, restart Outlook.” Obviously, since I am writing this, restarting Outlook doesn’t help. If I change the account I reply from to one of the others it sends with no trouble. If I remove the certificate, outlook/CSE complains there is no certificate, but lets me send it unsigned. I have removed and reinstalled both the account in Outlook and the certificate.
Last resort was to request a new certificate, but it won’t let me get a new signature for an account I have already got a signature for.
I am out of good ideas - can anybody help?
(I use Win7 and Outlook 2010)
I just downloaded and installed the latest version - requested a certificate, which successfully installed and I get the same error.
I’m running Win7 with Outlook 2010.
I am having that problem also! Someone from COMODO please help! ???
I have given up and removed the Comodo program. The support department has stopped replying to my messages.
Rgds
Per
you: I am testing Comodo SecureEmail and have a constant problem I cannot solve
you: Evertime I try to send an email message I get the error message “operation failed. The messaging interfaces have returned an unknown error. if the problem persists restart outlook.”
you: This is happening on two different computers and there is no help in the forums
you: Can you assist?
Kevin: Is it outlook 2007 ?
you: no, 2010
you: both 32 bit installations
Kevin: Did you tried the suggestions provided in this Microsoft article : http://support.microsoft.com/kb/814441
you: let me look …
you: this only happens with the Comodo secure email installed …
you: and it is only applicable to
you: APPLIES TO * Microsoft Office Outlook 2007 * Microsoft Office Outlook 2003 * Microsoft Outlook 2002 Standard Edition
you: if i have to go through this go get Comodo to work I don’t think it will be work the hassle and i will find another program to evaluate
Kevin: Please send a mail to desktopsupport@comodo.com along with the error screen shot so that we can analyze the issue and get back to you with a possible solution.
you: ok
I myself have had this issue in Outlook 2010 and it can be solved by following the steps here:
Basically, even though the certificate is installed, it must be CHOSEN to sign and encrypt e-mails. This does not seem to be the case in earlier versions of Outlook (e.g. I had no issue like this in Outlook 2003).
Hope that helps.
QUOTE from aforementioned site:
If you have a Digital Certificate, you can use it to digitally sign and encrypt emails. When you are using Microsoft Outlook as your email client, you will need to first configure Outlook to use your certificate. This document assumes that you have Outlook 2010 configured as your email client (Note: the certificate installation process differs slightly for Outlook 2003 and Outlook 2007).
- First you must have your Digital Certificate installed on your computer. Depending on the way that you receive your certificate, you may have to view another knowledge base article on how to install a Digital Certificate on your computer.
- Once you have your Digital Certificate installed, you should open Outlook.
- Once Outlook is opened, click on the orange File tab at the top left.
- On the left hand set of options, click on the Options button.
- A window entitled Outlook Options will appear. On the left-hand pane, click on the Trust Center button at the bottom of the list.
- The right side of the window will change. Click on the Trust Center Settings button on the bottom right hand side.
- A window named, Trust Center will appear. On the left hand side you shall see selectable options. Click on the E-mail Security option on the left hand pane.
- Upon clicking on the E-mail Security button, in the right hand pane, you will see a drop down field next to Default Setting:. Click on the Settings button next to this field.
- A new window will appear named Change Security Settings. In this window, you will see two Choose buttons under the Certificates and Algorithms section.
Signing Certificate
First you will choose the signing certificate. This is the certificate that you will use to digitally sign emails that you send out. The email in the certificate that you have installed on your computer must match the email address that you are using to sign. This certificate must also be valid.
- In the Certificates and Algorithms section of the Change Security Settings window, you should see the heading, Signing Certificate:. Click on the Choose button directly to the right of this heading.
- A new window will appear named, Select Certificate. In this window, you will choose the Digital Certificate you would like to sign with from a list of certificates installed on this computer. Note: If you are unsure which certificate to choose, you can always highlight a certificate and click on the View Certificate button to see the details for that certificate.
- When you have selected the Digital Certificate, click on the OK button at the bottom.
When you return to the Change Security Settings window, you should see that the certificate you have chosen has appeared greyed out in the Signing Certificate field.
Encryption Certificate
Next you will choose the encryption certificate. This is the certificate that other users will use when attempting to encrypt an email to you. In typical use, you will use the same Digital Certificate for both signing and encryption (the exception is for Qualified certificates which are only able to digitally sign emails). You can still decrypt an email with an expired certificate.
- In the Certificates and Algorithms section of the Change Security Settings window, you should see the heading, Encryption Certificate:. Click on the Choose button directly right of this heading.
- A new window will appear named Select Certificate. In this window, you will choose the Digital Certificate you would use for encryption of emails from a list of certificates installed on this computer. Note: If you are unsure which certificate to choose, you can always highlight a certificate and click on the View Certificate button to see the details for that certificate.
- When you have selected the certificate, click on the OK button at the bottom.
When you return to the Change Security Settings window, you should see that the certificate you have chosen has appeared greyed out in the Encryption Certificate field. When you have finished selecting your Digital Certificate, you can press the OK button at the bottom.