Invalid certificate When I try and send e-mails using outlook it says "Invalid certificate" Microsoft Outlook could not sign or encrtypt this message because you have no cetificates .... This just started [email protected]

That error can indicate that Mail Merge Toolkit is disabled in Microsoft Outlook.
To resolve the issue go to File / Options / Add-ins / Manage / Disable Items. Find and enable OutlookSenderAddin.dll
Next, go to File / Options / Add-ins / Manage / COM Add-ins. Find and enable Mail Merge Toolkit.
And restart Microsoft Outlook.
Please contact the MAPILab Support Team for more detailed instructions. And make sure to use the latest version. https://www.mapilab.com/outlook/mail_merge/

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Try to restart Microsoft Outlook, Word and Publisher. And make sure to use the latest version available at https://www.mapilab.com/outlook/mail_merge/
And contact the MAPILab Support team for any assistance required.

Having the same issue

Try to restart Microsoft Outlook after instalation. And make sure to use the latest version available at https://www.mapilab.com/outlook/mail_merge/

You can contact the MAPILab Support team for any assistance required.

there is several reason for this, the most common one is the outlook data file is invalid.
you can fix this by go to control panel, and then to mail and then data files, determined which outlook data file should be used by default.

It sounds as though you're using Outlook to send email to and from and ISP and not to or from a Microsoft Exchange server. If so, then the following applies.

The error message means that there is a configuration problem with your email account settings. This error usually happens when an error has been made when specifiy the name of the outgoing (SMTP) mail server.

Note: It may be necessary to contact your ISP to obtain their specific mail server information. The standard port number for Incoming mail (POP3) is 110. The standard port number for Outgoing mail (SMTP) is 25.

Here's what you need to do to verify your settings:

1. Contact your ISP to obtain their specific mail server settings.
2. Open Outlook
3. Click on the "Tools" menu item then click on "Account Settings".
4. Make sure you are on the "Email tab" of the account setting dialog box.
5. Double click on the email account that is listed under "Name".
6. The Internet Email Settings dialog box will appear.
7. Look for the heading "Sever Information". Below that heading you will see Incoming and Outgoing Mail Server . Verify the names of your mail servers match the information given to you by your ISP.
8. If your ISP have provided you with port numbers other than those listed in the note above, perform steps 9 to 12. Otherwise proceed to step 13.
9. From the Internet Email Settings dialog box, click on the "More Settings" button.
10. Click on the "Advanced" tab.
11. Change the Incoming and Outgoing mail server ports to match the information provided by your ISP.
12. Click the OK button to save the changes.
13. Click on the "Next" button.
14. Click on the "Finish" button.
15. Click on the "Close" button to colse the account settings.

Outlook will now be configured properly to send and receive Internet Email.

: Right click on start > Open all users

2: Choose tools> Folder options> File types

3: Check the file association for *.eml

4) Change the association to Outlook Express

5) Test Outlook express

>what is the file extension
>lets save the file on desktop and open it
>may i know which application are we using to check mail
is webmail, or outlook or some other program

Try this:

Create a "fake" email account that has an invalid username/password to a (real) SMTP server (Outlook requires that the SMTP server is real). And then set that as yourdefault account.

Now, whenever you accidentally forget to select the correct account, the default is selected and the message will try to send through the invalid account and pop up an error message. You can then go into the Outbox, select the right account, and re-send.