In the modern era we all are using the Blackberry for mails but in the starting of the mail service on the Blackberry we do face Blackberry to mail server connection issue therefore add the following Blackberry ips in the server firewall, so that Blackberry ips won’t get blocked in the server firewall or you will face any connection from Blackberry ips. The Blackberry Mail ips is as follows, you can ask your hosting provider to white list Blackberry ips.
206.51.26.0/24
193.109.81.0/24
204.187.87.0/24
206.53.144.0/20
216.9.240.0/20
67.223.64.0/19
93.186.16.0/20
68.171.224.0/19
74.82.64.0/19
173.247.32.0/19
178.239.80.0/20
180.149.148.0/22
180.168.204.0/22
