Amavis IP and ports required for correct operation.

Hello,
Many rejection lines related to IP 208.83.137.117 and 208.83.137.118 appear
in the log, on a CentOS postfix e-mail server. Does the Amavis service need
to communicate with these addresses and ports?
I appreciate your help.
A. Costa

Additional information:

grep "208.83.137." messages
Oct 29 18:25:22 myserver kernel: DENY IN= OUT=External SRC=MYSERVERIP
DST=208.83.137.117 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=20781 DF PROTO=TCP
SPT=53858 DPT=2703 WINDOW=29200 RES=0x00 SYN URGP=0
or
Oct 29 18:25:22 myserver kernel: DENY IN= OUT=External SRC=MYSERVERIP
DST=208.83.137.118 LEN=60 TOS=0x00 PREC=0x00 TTL=64 ID=20781 DF PROTO=TCP
SPT=53858 DPT=2703 WINDOW=29200 RES=0x00 SYN URGP=0


netstat -atnp | grep "208.83.137.118"
tcp        0      1 MYSERVERIP:53418    208.83.137.118:2703     SYN_SENT
7620/amavisd (ch7-0