> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://help.serverfreak.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Email not sending from Client or Webmail

### Problem:
Trying to send out emails from multiple email accounts fail from both webmail and third party email clients.


### Possible Reasons:

* The **maximum emails per hour** have been **exceeded**. This can be caused by forwarders or by mailing lists. The default is 150 per hour. Feel free to contact us via **Phone, Live Chat** or by **Opening a Ticket** if you would like this increased. Please include detailed information regarding why you need the limit increased.

* This can be caused if **one** of the accounts has **reached or exceeded** its **Disk Quota** for the email account. This can, at times, **cause other email addresses** on the account **to not** be able to **send email**. There will also be problems when sending an email from an online external email client such as Hotmail, Yahoo, or Gmail to that email address. The email will bounce back as **undeliverable**.

* **Exim**, the local MTA (mail transfer agent), could be down on the server.

* Our **mail proxy servers could have their email queues backed up**. When this happens, please be patient as there will be a **delay of 3-4 hours** before the email is delivered.



### Solution:

**Potential Solutions:**

* If the email is returning a **550 verification failed** or **sender verify failed error**, when sending from that email address and other email addresses on the account, then it could be related to one account **exceeding its quota** or related to authentication of the SMTP server from the email client. If you get the error below, from the webmail client SquirrelMail, then it's due to the mailbox quota reaching its limit.
* Sending an email inside webmail to the email address which has the quota exceeded will result in a bounceback error.
* When sending an email to the email address from an external client (such as from hotmail), a bounceback message will arrive saying:

_This is an automatically generated Delivery Status Notification._
__
_Delivery to the following recipients failed._
__
_user@yourdomain.com_

1. When logging into **cPanel**, the upper left hand corner will list a warning for each email
account that has met its quota.

2. You can then go to **Email Accounts** and either delete emails to decrease the Disk Space size of what has been stored, or you can increase the **Disk Quota** storage by selecting **Change Quota**.

3. Now, when you send out email it will be delivered.