Outlook Timeout error might occasionally appear while sending emails in Outlook. When there are large attachments in the email, this happens most frequently. The default option for server timeouts is one minute. However, if you are sending bulky attachments, it can take a while. A few days ago, I also faced this error and searched for a solution. I found this informative article. It mentioned 06 solutions to fix this error efficiently. You can take the help of this write-up to fix the Outlook timeout error.