Outlook Mail stuck in Outbox

Hello All,

While sending emails through outlook mails are getting stuck in outbox folder and when I open the outlook that time mail sent to end user.
This is happening in Production environment so I cant open the outlook. Any lead on this would appreciate. I don’t wana open outllook

Hi ,

You can try using start process(start your outlook process) before sending mail.hope this will resolve your issue


Could you tell me what parameter I should pass?

Drag a start process activity and provide your outlook execution file(ex: “C:\Program Files\Microsoft Office\Office16\OUTLOOK.EXE”) path. please find the sample


Here I have mentioned some points that you should keep in mind to keep yourself protected from Outlook mail stuck in outbox issue.
1. Verify your Internet service provider to make assured it doesn’t block the port number that you are using for the outgoing mail server (some providers block port 25 or other ports that may be used by an outgoing / SMTP mail server);
2. check with your email address provider and make assured your mail server settings are up to date. Irregularly, mail server providers change port numbers or authentication methods, so even if your Outlook account used to send emails without any problems, it may not be working anymore because the outgoing mail server settings were changed;
3. check with your email address provider and make sure you didn’t overdo the hourly/daily email send quota (or other send limits enforced by your email provider);
4. If you are on a late Internet connection, make sure your Outbox emails are not assumed to include very large attachments (10 – 20 Mb or more). The server connection may time out before Outlook gets to transmit a large email;

Here are some common reasons for outlook stuck-
. Network issues
. Large attachment
. Usage of Outlook by a third party
. Wrong settings
You can try-
Click on the email and press reply to all. It will open in a new window and then press SEND.
Check this helpful guide- https://www.stellarinfo.com/blog/troubleshooting-steps-fix-outlook-2013-stuck-loading-profile-screen/