# Email could not be sent or delivered | SmartMail

> Troubleshooting: situations such as the sending rate limit, blocked file type and rejection by the recipient server, and the steps to resend the email.

Source page: https://dblinx.net/en/smartmail/belgeler/sorun-giderme/mail-gonderilemedi

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# Email could not be sent or delivered

When an email cannot be sent, SmartMail clearly states why. Warnings shown at send time appear in the compose window; if the recipient's server rejects the email, they appear when you open the email in the **Sent** folder.

- User with write permission in the mailbox

## Email could not be sent or delivered: what should be done?

When an email cannot be sent, SmartMail clearly states the reason. Who can apply: Users with writing permission in the mailbox. Warnings that appear at the time of sending appear in the writing window, and when the recipient's server rejects the email, they appear when opening the email in the Sent folder. Open the Sent folder and click on 'Problem' at the top of the list. The 'THIS EMAIL COULD NOT BE DELIVERED' banner states the reason; for example, the recipient's address was not found.

## Resending an undeliverable email

Open the **Sent** folder and click **Problematic** above the list 1.

Open the email. The "THIS EMAIL COULD NOT BE DELIVERED" banner states the reason 2; for example, the recipient's address could not be found.

If the address is wrong, rewrite the email with the correct address. If the issue is temporary, click **Resend** 3. To dismiss the warning, select **Dismiss warning**.

- 1Undeliverables

- 2The reason is given here

- 3Resends

An undeliverable email, with demo data.

## Warnings that appear when sending

"You sent too many emails in a very short time."

The number of emails that can be sent in a short period is limited for security reasons. Wait a few minutes and try again.

"This file type cannot be added for security reasons."

Executable files and disk images (such as .exe, .bat, .js, .iso) cannot be sent. Send the document in a format the recipient can open (for example, PDF).

"File is too large" or "Total attachment size exceeds the limit".

The total attachments cannot exceed 25 MB; larger files are sent as a link up to 250 MB.

"Select a sender before sending." / "Enter at least one recipient."

Select the **Sender** mailbox and add at least one recipient in the **To** field.

## Related pages

- [Adding files and sending large files](/en/smartmail/belgeler/kullanici/dosya-ekleme)

- [The recipient field appears empty or the address is red](/en/smartmail/belgeler/sorun-giderme/alici-alani-bos-gorunuyor)

- [SmartMail features](/en/smartmail/ozellikler)