Resolving “Too Many Simultaneous Connections” Error

Resolving “Too Many Simultaneous Connections” Error


Encountering a “Too Many Simultaneous Connections” error in your email app, particularly when accessing your Gmail account, can disrupt your communication flow. This article delves deeper into the issue, providing insights into why it occurs and offering practical solutions to resolve it.

Understanding the Issue:

Gmail employs several security measures to safeguard your account, which may impact its usability and functionality within your email client. Like many email providers, it imposes limits on concurrent IMAP connections. IMAP (Internet Message Access Protocol) is a standard protocol used by email clients to retrieve emails from a mail server. Gmail supports up to 15 simultaneous connections by IMAP, meaning that any attempt to exceed this limit can result in the “Too Many Simultaneous Connections” error. It’s important to be mindful of this restriction when troubleshooting connection issues with your email app.

Causes of Excessive Connections:

  • Background Email Programs: Email programs running in the background on various devices, such as computers, smartphones, or tablets, may maintain persistent IMAP connections to Gmail. These connections can accumulate over time, leading to the error.
  • Unused Devices: Devices that remain powered on but are not actively used, such as secondary smartphones or tablets, may also maintain IMAP connections to Gmail. Even though you may not be actively checking emails on these devices, they contribute to the total connection count.
  • Third-Party Services: Some third-party applications and services may integrate with your Gmail account via IMAP to access emails or perform automated tasks. These services can consume IMAP connections, especially if they synchronize data frequently or maintain continuous communication with Gmail servers.

Resolving the Error:

  1. Close Background Email Programs: Ensure that all email programs running in the background on your devices are closed or properly terminated. This action prevents unnecessary IMAP connections from accumulating and helps alleviate the connection overload.
  2. Disable Unused Devices: Turn off or disconnect any unused devices that have IMAP access to your Gmail account. By reducing the number of active devices, you can minimize the overall IMAP connection count and mitigate the error.
  3. Identify Culprit Programs or Devices: Methodically troubleshoot by closing or disconnecting devices and email programs one at a time and checking your connection on Canary Mail to identify the source of excessive IMAP connections. Once identified, you can take appropriate actions to address the issue.
  4. Manage Third-Party Services: Review and selectively disable any third-party applications or services that access your Gmail account via IMAP. Temporarily disabling these services can help determine if they contribute to the connection overload.
  5. Optimize IMAP Access: Gmail allows you to optimize IMAP access by limiting the number of recent emails offered to email programs and services. By imposing a limit on the number of recent emails fetched via IMAP, you can improve the speed of IMAP access and reduce the likelihood of encountering the “Too Many Simultaneous Connections” error. Adjust this setting as needed to optimize your email experience while staying within Gmail’s connection limits.


The “Too Many Simultaneous Connections” error in your email app is often a result of exceeding Gmail’s IMAP connection limits. By understanding the causes of excessive connections and implementing the suggested solutions, you can effectively resolve the error and regain seamless access to your Gmail account. Regular monitoring and management of connected devices and services are essential to prevent recurrence of this issue in the future. Additionally, optimizing IMAP access settings can further enhance your email experience and mitigate connection-related errors.

Also see:

  1. Add Gmail to another email client
  2. Apps with access to your google account