This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(304, 60%, 39%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Hello. I have an application that sends emails via POP3. About 500 emails leave the server in 10 seconds.
I converted it to anonymous sending. Now I have one email going out in a minute.
What can the delay be caused by and how to fix it ?
I converted it to anonymous sending.
You could use Telnet command to send emails? You can also check the mail flow for it with Message Tracking Log:
Get-TransportService | Get-MessageTrackingLog -Recipients user@domain.com -MessageSubject "subject" -Start 10/17/2022 -End 10/19/2022
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.
You could use Telnet command to send emails?
As I said, sending works on an anonymous connector. https://learn.microsoft.com/en-us/exchange/mail-flow/connectors/allow-anonymous-relay?view=exchserver-2019
Messages take a long time to process in the queue. There are no errors, no status, just one message is sent about once a minute.
I would suggest you try to use Telnet to send email on your Exchange server (This is a quick way to narrow down for anonymous connector). It could help us to narrow down this issue related to connector or mail client.
The emails are sent via telnet. My emails are sent through the app once a minute. Sending 500 emails at once.
I can't figure out why they are taking so long in the queue.