IP address ranges for incoming and outgoing emails

This article describes which IP address ranges are used for sending and receiving e-mails via creoline E-Mail Protection.


This article was last updated on 31.08.2024.



IP address ranges for incoming e-mails

The following IP address ranges are used for incoming e-mails:

address range protocol
5.1.77.49/32 IPv4
5.1.78.4/32 IPv4
5.1.77.50/32 IPv4
5.1.77.51/32 IPv4
5.1.77.52/32 IPv4
5.1.77.53/32 IPv4
5.1.77.54/32 IPv4
5.1.77.55/32 IPv4
5.1.77.56/32 IPv4
5.1.77.57/32 IPv4
5.1.77.58/32 IPv4
5.1.77.59/32 IPv4
49.12.130.5/32 IPv4
5.1.73.224/27 IPv4
2a07:6fc0:0:2::49 IPv6
2a07:6fc0:0:2::4 IPv6
2a07:6fc0:0:2::50 IPv6
2a07:6fc0:0:2::51 IPv6
2a07:6fc0:0:2::52 IPv6
2a07:6fc0:0:2::/64 IPv6


Attention:
When using a firewall for incoming traffic, the above IP address ranges must be enabled for incoming TCP connections on port 25.



IP address ranges for outgoing e-mails (send connector)

The following IP address ranges are used for outgoing e-mails:

address range protocol
5.1.77.49/32 IPv4
5.1.78.4/32 IPv4
5.1.77.50/32 IPv4
5.1.77.51/32 IPv4
5.1.77.52/32 IPv4
49.12.130.5/32 IPv4
5.1.73.224/27 IPv4
2a07:6fc0:0:2::49 IPv6
2a07:6fc0:0:2::4 IPv6
2a07:6fc0:0:2::50 IPv6
2a07:6fc0:0:2::51 IPv6
2a07:6fc0:0:2::52 IPv6
2a07:6fc0:0:2::/64 IPv6
2a07:6fc0:0:3::/64 IPv6
2a07:6fc0:1::73:0:0/120 IPv6



IP address ranges for delivery via SMTP (SMTP server)

address range protocol
5.1.77.15/32 IPv4
5.1.73.222/32 IPv4
5.1.73.223/32 IPv4


Attention:
When using a firewall for outgoing traffic, the above IP address ranges for outgoing TCP connections must be enabled on port 465 (SSL/TLS) and port 587 (STARTTLS).