As an Outlook user, I have often come across the error ‘cannot send email from Outlook.’ It annoyed me a lot, because it would emerge even when there was active internet connection. So, I decided to take a look at the roots of this problem. I contacted some of my colleagues who were experts in detailing with Outlook issues. When I explained to them the problem, they gave me three scenarios under which the issue could emerge and the possible remedies to fix the problem. Here is a short account of each of these scenarios.
SMTP server (Outgoing email server) requires SPA (Secured Password Authentication)
Outgoing email server needs to be authenticated before you are being able to send email from your Outlook application, no matter where it is installed. Many of the webmail services that use either IMAP or POP3 protocols allow the users to enable SPA (secured password authentication) in order to ensure safety of the email account and encryption of their data. If you have opted SPA in your email account, you should make sure that the same settings are reflected in your Outlook settings as well.
In Outlook, the place where you have to specify whether your account should be SPA enabled or not is the SMTP settings screen. Open your Outlook and navigate to Settings, followed by Outgoing email setting. Verify the outgoing email authentication settings and ensure that the SPA authentication is enabled.
ISP blocking access to the port 25
The default port for SMTP is 25. Certain internet service provides block your email client’s access to the said port. As a result, you will be confronted with the error message ‘cannot send email from Outlook.’ The internet service provider (ISP) has a reason to block this port. In fact, blocking port 25 prevents the majority of the spam into the machine. But what is the use of preventing spam at the cost of blocking the entire emails to your PC.
The best way to deal with this issue is to change your SMTP port. You can change it to either
587 or 1025.
Verify the Outgoing email server settings in Outlook
If neither of the above methods fixed the issue, you could suspect incorrect SMTP settings as the culprit. Navigate to Outlook’s Outgoing Server Settings and ensure that all the information given in there are accurate.
Any of the aforementioned methods would fix the issue you have with sending emails from Outlook. Contact our support desk if the issue persists.