May 08, 2021 · Sometimes the server responded 421 cannot connect to SMT error can occur when your antivirus software conflict with Outlook. To avoid the error, you can add the email server to the Exclusion list of your antivirus software. If you are using Avast on your computer, read this post to add an exception to Avast.
08.10.2020 · As per reports, lately, some of the MS Outlook users have claimed that while sending an email their server responded with a message stating, “Server Responded: 421 Cannot Connect to SMT / SMTP server”.
Dec 28, 2020 · The server responded: 421 cannot connect to SMTP server error is basically associated with Microsoft Outlook accounts. It occurs most often while trying to send an email message via the platform. Although the most common cause is improper SMTP configuration, there are many other factors that could cause this error.
Oct 08, 2020 · As per reports, lately, some of the MS Outlook users have claimed that while sending an email their server responded with a message stating, “Server Responded: 421 Cannot Connect to SMT / SMTP server”.
How To Fix "421 Cannot Connect To SMTP Server in Outlook" Issue? First of all, Let's start with a video we curated for you, which covers the most common reasons that cause Outlook cannot connect to SMTP server, and how to fix them …
08.05.2021 · A lot of users report that they encounter the 421 cannot connect to SMT error in Outlook. Don’t worry. This post will provide you with several effective fixes.
03.02.2021 · To repair a PST by using Stellar Repair for Outlook and fix Outlook 421 cannot connect to SMT error, follow these steps: Launch the software. In the selection window, click Browse to select the PST file.
1 Reconfigure SMTP settings · 2 Remove then add the email account · 3 Change the SMTP port number · 4 Check Virtual Private Network (VPN) interference in Outlook.
1 Reconfigure SMTP settings Outlook error 421 can be fixed by reconfiguring the SMTP settings. So firstly, we will try to do this. Open the Mail application and opt for the "Settings" icon. Under settings, click on the "Accounts". Now, select the email account you want to edit. Select the "Change mailbox sync settings" option.