bokeland ha scritto:
> But i know Gmail blocked the 25 port as well, is it possible to just use
> 465 port.

False: Gmail accept incoming mail to port 25 as every other compliant
SMTP server.

What gmail does not accept on port 25 is to do relaying from gmail users
to external users: for this (message submission) you have to use port 465.

> The requirement here is to secure the SMTP, i guess.
> If it's a MUST, i have to ask the admin to open the 25 port

Port 465 is ignored in server to server communication. Server to server
communication happen on port 25 and at most uses STARTTLS extension (if
both client and server support it) to encrypt the conversation.

If you want to receive mail for a domain you need these things:
1) a static IP address
2) port 25 listening for incoming mail on that IP address
3) an MX record for your domain pointing to an A record pointing to your
IP address.

Stefano


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