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Issue Unable to send Mail

G

Gosmart

New Pleskian
Server operating system version
Ubuntu
Plesk version and microupdate number
Plesk Obsidian Web Admin Se Edition 18.0.54
I can receive the mail from Plesk Server, but I cannot send it to my personal email or other emails from Plesk Server.
and also I allowed the TCP Port 25 on the Plesk firewall.
 
Some hosting companies block the outgoing on Port 25. You can not unblock this via the Plesk Firewall. Only the hosting company can do this for you.

Please check "Tools & Setting > Mail Server Settings" and if it says the Port 25 is Blocked.
 
It seems that too much spam - or what GMail thinks is spam - was sent to GMail from your ip address. They blocked your ip.
 
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