Mail forward and double posts

[Jillian]

I have issue with mail forwarding.
I have mail user1@domain.tld and alias alias1@domain.tld.
When I send mail to alias1@domain.tld, it comes 2 times to user1@domain.tld.

I'm using ispcp 1.0.0, OS Debian 5.0

[kilburn]

Please provide the relevant /var/log/mail.log lines...

[Jillian]

Code:

May 14 12:22:58 hostingnetworks amavis[10057]: (10057-01) Passed CLEAN, <root@dedic-4.wmhost.com> -> <xx>,<xx>, Message-ID: <200
90514092258.35AB4CC2AA@dedic-4.wmhost.com>, Hits: -, 223 ms
May 14 12:22:58 hostingnetworks postfix/smtp[29213]: 35AB4CC2AA: to=<xx>, relay=127.0.0.1[127.0.0.1]:10024, delay=0.28, delays=0.04/0.01/0.0
1/0.22, dsn=2.6.0, status=sent (250 2.6.0 Ok, id=10057-01, from MTA: 250 2.0.0 Ok: queued as 63651CC2A8)
May 14 12:22:58 hostingnetworks postfix/smtp[29213]: 35AB4CC2AA: to=<xx>, orig_to=<xx>, relay=127.0.0.1[127.0.0.1]:10024, delay=
0.28, delays=0.04/0.01/0.01/0.22, dsn=2.6.0, status=sent (250 2.6.0 Ok, id=10057-01, from MTA: 250 2.0.0 Ok: queued as 63651CC2A8)
May 14 12:22:58 hostingnetworks postfix/virtual[29295]: 63651CC2A8: to=<xx>, relay=virtual, delay=0.09, delays=0.06/0.03/0/0.01, dsn=2.0.0,
status=sent (delivered to maildir)
May 14 12:22:58 hostingnetworks postfix/virtual[29295]: 63651CC2A8: to=<xx>, orig_to=<xx>, relay=virtual, delay=0.1, delays=0.06
/0.03/0/0.01, dsn=2.0.0, status=sent (delivered to maildir)
May 14 12:22:58 hostingnetworks postfix/virtual[29295]: 63651CC2A8: to=<xx>, relay=virtual, delay=0.1, delays=0.06/0.03/0/0.01, dsn=2.0.0, status=sent (delivered to maildir)

// MOD-EDIT: SET CODE TAG -> BeNe

[BeNe]

You installed MAIA or AMVis on your own ?

Greez BeNe

[Jillian]

Yes, I read manual from here.

I also checked ispcp file /etc/postfix/iscpc/aliases.
There are lines like that:
frank.russi@rafka.fi frank.russi@rafka.fi,frank@rafka.fi
I wonder why that mail is twice in there? Is it correct?