The list of IPs used for delivery can be found on our website https://europeanmx.eu/de/mxstatus. 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.
Please note: 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.