Something here may help.
https://learn.microsoft.com/en-us/azure/virtual-machines/windows/nsg-quickstart-portal
Can i ask to open 25 port without subscription?
Hello. Want to open 25 port. Because i followed instructions, but can't create request because have free subscription.
Technical > Virtual Network > Connectivity > Cannot send email (SMTP/Port 25)
Can i ask to open 25 port without subscription?
2 answers
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Anonymous
2020-07-04T16:04:26.333+00:00 -
Manu Philip 18,561 Reputation points MVP
2020-07-04T16:04:59.617+00:00 Hello @vozglavin-1847,
Unauthenticated outbound SMTP on port 25 is blocked in Azure.
See: https://learn.microsoft.com/en-us/azure/virtual-network/troubleshoot-outbound-smtp-connectivityCheck Pay as you Go section for how to remove the restriction or use a service that supports authenticated mail.
Please mark as "Accept the answer" if the above steps helps you. Others with similar issues can also follow the solution as per your suggestion
Regards,
Manu