Updated on March 16th, 2023
Summary: In this article, you will find the effective solution of how to resolve Outlook certificate error messages? Here we also discuss the main reasons that can cause the Outlook certificate error. Sometimes, the corrupt PST files can cause this error that generates the need to use a PST file recovery tool.
MS Outlook is one of the most popular email clients that effectively manage all the email activities in the business world. Normally, it works smoothly but sometimes due to various reasons Outlook security certificate alerts keep popping up. It mainly occurs when we are trying to connect to an insecure mail server.
The error message appears as: The server you are connected to is using a security certificate that cannot be verified.
You can not access your email account through Microsoft Outlook without eliminating this error. Before discussing the methods of how to fix Outlook certificate error, let’s find out the possible reasons behind this issue.
The security certificate error message in Outlook might pop up when MS Outlook can not maintain the connection with an email account. Some of the main reasons behind this Outlook error are:
These are some common issues that cause the security error message in Outlook. Does any question arise in your mind like How do I fix certificate error in Outlook? Thus to get the solution, you need to follow the methods explained below.
Here, you will find out the most effective manual techniques that you can apply to resolve this issue. These methods will help you to fix the other common errors in Microsoft Outlook as well. There are multiple Outlook errors arises for the users among them Outlook keeps asking for password is common. Users can fix this error with the help of mentioned article.
First, you need to verify the certificate name in Outlook is the same as the name provided in the mail server. Perform the following steps to verify the certificate name in Outlook.
Note: You should remember that it will not work if the certificate has multiple names. In that scenario, you have to try every hostname that is available and check if any of them works out. If not, then you need to contact your Internet Service Provider (ISP) for any changes made in their DNS.
Sometimes, the places like schools, universities, colleges, or government offices, etc. blocked the most commonly used SSL ports due to security reasons. These ports are SSL POP port 995, IMAP 993, and SMTP 465. In such a case, you need to add Non-SSL ports that are not blocked in those places. Some of the Non-SSL ports that you can use are:
If you are using shared web hosting then you need to ensure that you are using the domain name of your hosting as your name server. Because in shared hosting, the hosting company provides the same mail server address to the various domains. They don’t renew the SSL certificate in fact they only expand it for their own domain.
Therefore, you should use the domain name of your hosting as your mail server to eliminate the Outlook certificate error.
Example – “mail.yourhostingdomain.com” instead of “mail.yourdomain.com”
You need to check your Outgoing SMTP port server if you are still searching for a solution of how to fix Outlook certificate error. Many internet service providers (ISP) have blocked SMTP port 25 because of spamming. You have to change it to some other port number. Execute the following steps to change your Outgoing SMTP Port:
In the end, change the Outgoing SMTP Server Port and then click Ok to save the settings.
Note: You have to generate a certificate for those mail servers whose certificates have not been generated yet via Certificate Authority. Further, if you are installing a certificate, remember to install a custom certificate or a certificate that is specific to a particular mail server.
In most cases, the above methods provide a solution of how to fix Outlook certificate error. However, if you are still thinking about How Do I Fix a Security Certificate error in Outlook? Scan your PST file and check whether it is corrupted or not. If it is, opts with a professional Outlook PST Recovery tool to repair the PST files.
The Outlook certificate error may occur due to the corrupt PST files. You can recover your data from these corrupted files by using a PST file recovery tool. It is a reliable solution to repair and recover the data of your corrupt PST files.
Here, we discussed different manual solutions to fix the Outlook certificate error message and the possible reasons that can cause this error. Moreover, if this error occurs due to a corrupt PST file, use this professional solution and recover your data from the corrupted PST file with ease.
About The Author:
I'm a content writer in the field of Email Migration, Data Recovery, Email backup, and File Management. I started this writing career two years back. I think the vast range of information in this industry is the reason I am so fascinated to read about the newer techniques and technology.