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---
id: pop3
title: Monitoring POP3
sidebar_label: POP3 Monitor
keywords: [open source monitoring tool, open source java monitoring tool, monitoring POP3 metrics]
---
> Collect and monitor the general performance Metrics of POP3.
**Protocol UsePOP3**
## Enable POP3 Service
If you want to monitor information in 'POP3' with this monitoring type, you just need to open `POP3` service in your mail server.
**1、Open `POP3` Service:**
```text
Using QQ Mail as an example [similar for other email services]:
1. Click the "Settings" option
2. Select "Account"
3. Find the option to enable SMTP/POP3/IMAP, and turn it on
4. Obtain the POP3 server domain name, port number, and authorization code [provided by QQ Mail after enabling SMTP/POP3/IMAP services]
5. Connect to the POP3 server using the POP3 server domain name, port number, QQ email account, and authorization code to collect monitoring metrics
```
### Configuration parameter
| Parameter name | Parameter help description |
|---------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Monitoring Host | Monitored IPV4, IPV6 or domain name. Note⚠️Without protocol header (eg: https://, http://) |
| Monitoring name | Identify the name of this monitoring. The name needs to be unique |
| Port | Port provided by POP3 |
| SSL | POP3 If enabled SSL |
| Timeout | Allow collection response time |
| Collection interval | Interval time of monitor periodic data collection, unit: second, and the minimum interval that can be set is 30 seconds |
| Whether to detect | Whether to detect and check the availability of monitoring before adding monitoring. Adding and modifying operations will continue only after the detection is successful |
| Description remarks | For more information about identifying and describing this monitoring, users can note information here |
### Collection Metrics
#### Metrics Setemail_status
| Metric name | Metric unit | Metric help description |
|--------------|-------------|-----------------------------------------|
| email_count | | Number of emails |
| mailbox_size | kb | The total size of emails in the mailbox |