Queued email

A "queued email" refers to an email that has been sent to a mail server or email service provider's queue, but has not yet been delivered to the recipient's inbox.

Here's what happens when you send an email:

1. Your email client (e.g. Gmail, Outlook) sends the email to your email service provider's (ESP) server.
2. The ESP's server checks the email's validity, including the sender's email address, subject line, and content.
3. If the email passes the validation checks, the ESP's server adds it to its queue.
4. The ESP's server then processes the email in the queue, which may involve:
   • Checking the recipient's email address and ensuring it's valid.
   • Looking up the recipient's email server and determining the best route to deliver the email.
   • Sending the email to the recipient's email server.
5. Once the email is delivered to the recipient's email server, it's stored in their inbox or spam folder, depending on the email server's filtering rules.

Queued emails can occur for various reasons, such as:

• High email volume: If an ESP is experiencing a high volume of emails, it may queue them to prevent overload and ensure reliable delivery.
• Network issues: Temporary network outages or congestion can cause emails to be queued.
• Recipient's email server issues: If the recipient's email server is down or experiencing issues, emails may be queued until the issue is resolved.

To check the status of a queued email, you can:

• Check your email client's sent folder or outbox to see if the email is still listed as "sent" or "queued".
• Contact your ESP's support team to ask about the status of the email.
• Use a third-party email tracking tool to monitor the email's delivery status.