Getting irritated because you are all set with drafting and proofreading but still unable to send emails from your IMAP account is completely natural. This can be due to the error "Your IMAP server has closed the connection. This may occur if you have left the connection idle for too long." It is important to remove the issue from root within time to restore the communication line and avoid hiccups from the workflow.
To resolve IMAP server timeout error, you need some reliable methods that guide you throughout the process for a hassle-free fix. Whether you’re using Outlook, Thunderbird, Gmail, or Apple Mail, you can refer to this guide to fix IMAP Server timeout issue thoroughly.
Well, all your worries are going to end with this article. Read it to the last to find the best solutions to transfer data with zero data loss and 100% accuracy.
Some common reasons that can show IMAP Server timeout error in your IMAP email application include:
Slow connectivity: Slow internet connection or poor Wi-Fi network causes delays in response times, which results in server timeout.
Incorrect server settings: Entering wrong server configuration, such as port number, encryption details, hostname, or other authentication information can show you errors when sending emails.
Conflicting add-ins: Faulty add-ins or plugins installed within your email application can create disturbances in email messages. Outdated email applications can also be the reason of the errors.
Corruption in data files: When there is corruption in the data files, you might notice errors during email communication.
Firewall issues: Problems with the firewalls implemented and server outages/ maintenance lead to connection errors.
Here are some common troubleshooting tips that you can try to fix IMAP Server Timeout error:
Follow the methods below to resolve IMAP server timeout error:
Sometimes, due to firewall or some third-party antivirus software, you might encounter server timeout error. Here are the steps to disable a firewall:



Now try sending emails through your IMAP email application to see if the issue is resolved.
In Thunderbird, you can increase the server timeout value that gives your computer additional time to build the connection with the server. When server takes time to connect and respond due to slow internet or other issues, you can see the error IMAP server timeout. Follow the steps below to increase server timeout:
This solution might help you fix the connection to server timed out error in Thunderbird and send email messages without disturbances.
Another method that you can use to resolve IMAP server timeout error is adjusting the timeout value in Outlook. Follow the given steps:
Exit the app and restart Outlook to see if this removed the issue.
You can manage your mailbox size to handle the issue for efficient performance. To reduce mailbox size in Outlook, we will use the Mailbox Cleanup tool as explained in the steps below:


With these methods as described above, the IMAP Server timeout error can be resolved within the email client. However, there is no guarantee that this issue won't come up again. This induces risk of data loss, which demands a foolproof strategy to secure the crucial data.
With the help of a proper IMAP backup tool like Kernel IMAP Backup & Restore, you can save the backup of your data during IMAP Connection Timeout errors. It allows you to backup emails from IMAP account to PST, EML, MSG, HTML, and other file formats. You can save the output file within your local or network-attached storage for easy offline access. The tool allows you to backup data from more than 20 IMAP-based email clients, including Outlook, Gmail, Thunderbird, Yahoo, Zoho, etc. Moreover, you can also backup emails directly to the web-based email clients or to Office 365 groups.
IMAP server timeout issue is unpredictable and can annoy users as it tends to halt the sending of email messages. Learning about the reasons and solutions, you can fix IMAP server timeout issue without any issues. However, there is a huge risk of losing data during such processes, which is why we recommend that you backup IMAP server emails using Kernel IMAP Backup & Restore software. The tool assures you of saving emails without altering the integrity or structure of the data during the process.
Question: What are the possible causes of IMAP connection timeout error?
Answer: This error in IMAP server can be due to:
Question: What are the tips to avoid this error?
Answer: To avoid seeing the error IMAP Server timeout, you can manage large attachments within the email messages and try connecting a smaller number of devices to one IMAP account.

Best tool to backup IMAP mailboxes in PST, EML, MSG or other file formats.