umbertoghio wrote

My email is not recognised as valid in the "Sender Address", but it is in the user name.

Yes, it's a bug due to very restrictive validation.

On the other hand, hostname validation in EHLO SMTP requests is broken, too - here strict validation would make much more sense. Hopefully both bugs get fixed in next version.

Is there a config file somewhere where I can manually enter the proper settings? (I'm running the controller on Linux)

Don't know, didn't investigate this since the sender's from address isn't actually meaningful at all and thus can be any role account such as noreply@nowhere.com[EMAIL="noreply@nowhere.com"][/EMAIL] or eapctrl@yourcompany.com[EMAIL="dontanswer@yourcompany.com"][/EMAIL] (easier to change there).

Bonus Question:

I see "SSL" as an option, but my SMTP only uses STARTTLS, will it work?

Of course, yes. TLS1.0 is actually SSL3.1 (SSL 3.0 served as the base for TLS1.0). Actually it is TLS, but often people still call it "SSL" meaning the technique, not the protocol.

umbertoghio wrote

Hi,
thank you, I'll give it a try but if the email are sent with a FROM different than the account the smtp won't send it :-)

I see. I have no idea why TP-Link checks the TLD's "validity" - every TLD could be valid, even .lan or .mymailnetworkinmyhouse.