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Hi all, I’m running a WordPress site on Ubuntu 16.04 Server. Before using Digital Ocean Firewall feature. My WordPress site was sending outgoing emails without any problem but after enabling I’m getting following error in my mail server log:
server postfix/smtp[10014]: connect to gmail-smtp-in.l.google.com[2607:f8b0:400d:c03::1b]:25: Network is unreachable
Currently I’m using following rules in the firewall:
Inbound Rules: SSH TCP 22 DNS TCP TCP 53 HTTP TCP 80 HTTPS TCP 443 DNS UDP UDP 53
Outbound Rules: DNS TCP TCP 53 HTTP TCP 80 HTTPS TCP 443 DNS UDP UDP 53
Please help me which port rule I’ll need to add in the firewall to fix the issue, Thanks!
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