Is there a list of all IP addresses that connect to our mail server for delivery?

The list of IPs used for delivery can be found here. Please note that the IP addresses can change, as this list is constantly being expanded and updated. After changing the list you have the possibility to automatically receive a notification with a current overview via e-mail. Simply subscribe to the list by entering your e-mail address on the website.

Basically we recommend to use the hostname "delivery. antispamcloud. com" for sharing in a firewall. The hostname contains all the IPs that are used for delivery and could be used as reverse DNS for delivery.

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