Views:
1. Access IMSVA via SSH using your root credentials.

2. Create a backup of the main.cf file located under /opt/trend/imss/postfix/etc/postfix/ directory.

3. Generate 2048 bit DH parameters:
 # openssl dhparam -out dh2048.tmp 2048 && mv dh2048.tmp dh2048.pem

4. Copy the created .pem file to the postfix location:
# cp dh2048.pem /opt/trend/imss/postfix/etc/postfix/

5. Change the permissions of the created .pem file:
# chmod 644 /opt/trend/imss/postfix/etc/postfix/dh2048.pem

6. Update the postfix configuration pointing to the new file:
# postconf -e 'smtpd_tls_dh1024_param_file=/opt/trend/imss/postfix/etc/postfix/dh2048.pem'

7. Reload the postfix configuration
# postfix reload