There is an IP addition regarding mail processing in EU DC. The below mentioned IP have to be provided in addition to the old ones to the customers who enabled whitelisting in their mail server.
New IPs:
185.230.212.139
Existing IPs:
31.186.226.139
87.252.213.139
185.20.209.139
84.207.209.139
89.36.170.139
89.36.170.124
87.252.213.124
31.186.243.139
185.230.214.139
Kindly update your configurations at the earliest to ensure seamless connectivity.