Issue Can't send mail from Plesk Obsidian on Amazon Lightsail

[vkvisuals]

Hi!

Have been trying for hours, but can't find the reason why i can receive, but can't send mail from Plesk!
I have also enabled DMARC & DKIM, but the mail just won't send..

I have attached screenshots from various things related to this problem.

Could someone please help?

 

[IgorG]

Unable to receive or send e-mails in Plesk hosted on AWS/LightSail or Microsoft Azure: port 25 is blocked

Applicable to: Plesk for Linux Plesk for Windows Symptoms Unable to receive/send e-mails from Plesk hosted on Amazon Lightsail/AWS EC2 or Microsoft Azure instance. Outgoing mail connections ...

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