Altervista's mail forwarder does not make any change to an email. Only some header is added, but this kind of header is added by any server the message passes through.
We don't save messages we process, so I can't give you a copy. I can only give you this log row (i only replaced you email) where "status=sent" means that your provider's destination server has accepted the message. We can't say anything about what happens after that.
Code:
Nov 3 15:45:31 f2 postfix/smtp[13409]: F0A17CC3A6: to=<youremail@domain>, relay=in1-smtp.messagingengine.com[66.111.4.73]:25, delay=2.1, delays=0.01/0/1.7/0.36, dsn=2.0.0, status=sent (250 2.0.0 Ok: queued as 50CF73C03A9)
The timestamp timezone is GMT+1.