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# Which IP addresses need access to my SMTP/IMAP server?

> The IP addresses to allowlist on your SMTP and IMAP servers so Close can send and sync email in restricted corporate or IT environments.

Most email server configurations will not need to care about IP addresses. However, if you are in a corporate/IT environment where you can only give specific IP addresses access to your SMTP/IMAP email servers, you can use the list below:

* 52.11.177.187
* 52.13.247.226
* 52.27.236.234
* 52.32.48.248
* 54.71.177.103
* 54.186.6.46
* 54.200.191.154
* 54.202.71.213
* 54.214.129.39

> **Note**
>
> These IP addresses may change in the future, without warning, so keep this in mind if your email syncing/sending stops working at a future date.