# Why do I receive the warning message "Some emails have not been sent!" during request execution?

**URL:** <https://discuss.workflowgen.com/t/why-do-i-receive-the-warning-message-some-emails-have-not-been-sent-during-request-execution/426>\
**Category:** Workflow Portal\
**Created:** [October 7, 2004, 9:01pm UTC](https://discuss.workflowgen.com/t/why-do-i-receive-the-warning-message-some-emails-have-not-been-sent-during-request-execution/426 "2004-10-07T21:01:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![wfg-admin](https://yyz2.discourse-cdn.com/flex030/user_avatar/discuss.workflowgen.com/wfg-admin/32/714_2.png) [@wfg-admin](https://discuss.workflowgen.com/u/wfg-admin)\
**Post date:** [October 7, 2004, 9:01pm UTC](https://discuss.workflowgen.com/t/why-do-i-receive-the-warning-message-some-emails-have-not-been-sent-during-request-execution/426/1 "2004-10-07T21:01:37Z")

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If you receive this warning message, it’s because some of the notification recipients’ email addresses are incorrect or not defined. If the error still occurs after you’ve confirmed the addresses, check the address of the SMTP server in the **SMTP server** section on the **General** tab in the **Configuration Panel**. Then. try to send yourself a sample email by clicking on the **Test** link. For more information, see the [SMTP](https://docs.advantys.com/workflowgen-administration-module-reference-guide/configuration-panel#smtp) section in the [WorkflowGen Administration Guide](https://docs.advantys.com/workflowgen-administration-module-reference-guide).