Due to this error, you might not be able to use some applications that require Microsoft Outlook or if you want to use your favorite email account through Microsoft Outlook. In this article, we will be going through the potential causes of the issue in detail and later on explain the possible fixes that you can implement to get the problem sorted out.
What causes the ‘The Server you are Connected to is Using a Security Certificate that Cannot be Verified’ Error Message?
This error might pop up because the MS Outlook is not able to complete the connection process whether it was an email account or anything else. Usually, it is caused by some of these issues: Now, in order to fix the issue, you can use the solutions given down below.
Solution 1: Match Certificate Name
The first solution that you have to look for is that the name of the certificate in MS Outlooks is same as of the mail server. To do that, follow the given instructions: It is important to note that this might not work if the certificate has multiple names. In such a scenario, you need to try different names that are available and see if any among them works out. In case they don’t, you should contact your ISP regarding any changes made in their DNS and ask for further assistance.
Solution 2: Use domain of your hosting company as mail server (if using a shared web hosting)
Since, on shared web hosting, the web hosting company is hosting many mail servers of many domains and all of them point to the same address given that the mail server’s address is same. Furthermore, these web hosting companies can’t renew SSL for each domain as it’s very expensive so they do it only for their own domain name. Thus, at such times, there come certificate issues due to which you can’t connect to your mail server by using your own domain name and you get an SSL certificate warning. Therefore, it’s recommended to use the domain name of your hosting as your mail server:
Solution 3: Add Non SSL ports
Sometimes, in universities, schools and other places, there are some restrictions and many popular mail servers’ ports are blocked and the most common SSL ports as well for example SSL POP port 995, IMAP 993 and SMPTP 465. In such a case, what you can do is that you can try adding non-SSL ports and connect with these ports as they might not be blocked on your network. You can do this by following the instructions in the next solution. The ports are:
Solution 4: Change Outgoing SMTP Port to 26
Many ISPs block the SMTP port 25 because of spamming etc, so if your ISP has blocked it as well, then you need to change the SMTP outgoing to port to 26. Here’s how to do that: Note: It is recommended that you don’t install certificates unless it is a custom certificate or a certificate only particular to a certain mail server. The good thing is that you don’t need installing certificates at all while connecting to many of the popular mail servers. You only have to install certificates for those mail servers for whom certificates are not generated by a Certificate Authority. These certificates are called “Self Signed Certificates” and are only the certificates which need installation.
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