What IP addresses are used for connecting to the provider / delivering mail to the provider?

Nylas has a large pool of IP addresses that are used to connect to the provider and collect mail and deliver mail to the SMTP server. The provider may need to whitelist these IP addresses, this is especially common with IMAP and SMTP servers.

To find these IP addresses the developer of the application needs to retrieve them using our API endpoint and pass these onto the customer's mail administrator.

If you would like a smaller more manageable IP block, this can be arranged by paying for our Static IP fleet, which is smaller.

Example of a CURL request to get the list of IP addresses:

curl --request GET \
  --url https://api.nylas.com/a/<NYLAS_CLIENT_ID>/ip_addresses \
  --header 'Accept: application/json' \
  -u "<NYLAS_CLIENT_SECRET>:" \
  --header 'Content-Type: application/json'

Resources:

Return Application IP Addresses API endpoint

Updated August 09, 2024 10:13