Alpine using localhost address

I'm having a hard time figuring out what's going on with my setup, first there's no problem with the imap part as I can see my email, but when I try to send a message I get this error: [Mail not sent. Sending error: 501 Syntax error in parameters or arguments] As far as I know my smtp configuration is ok: mail.gmx.com:465/user=user@gmx.com/ssl When loking at the logs there are some entries that don't look like they're ok, it seems like alpine is using my localmachine address instead of my email address. ... MAIL FROM: ... EHLO mylocaldomain What can I do to change this behavior, I've been searching but can't find a parameter that to modify this. Thanks.