[fetchmail-users] fetchmail on server unable to connect to postfix

[M. F. <mfi...@ne...>]

Hello,

I have on my home computer the working fetchmail rc file shown below, to
download all the messages from my ISP pop3 server to my home box.

Now I want to reuse that file on a Centos server, separate from my home
desktop, running postfix, dovecot and fetchmail-6.2.5-6.0.1.el4

On that server there is no user "marco". There are only virtual email
users, and I'd rather not add other Unix users there. On the server there
is ad-hoc user without shell which is only used by postfix and dovecot to
deliver messages to mailboxes:

# grep mail_only_account /etc/passwd:

mail_only_account:x:2000:2000::/home/mail_only_account:/bin/false

However, if I run as user mail_only_account:

/usr/bin/fetchmail -vv  -f /usr/local/etc/Fetchmail/always

fetchmail always gets from postfix:

Helo command rejected: need fully-qualified hostname

no matter what I write in place of "marco": root, this complete address
mfi...@ne..., whatever.

More in detail:

fetchmail: SMTP< 220 the.server.com ESMTP Postfix
fetchmail: SMTP> EHLO localhost
fetchmail: SMTP< 250-the.server.com
fetchmail: SMTP< 250-PIPELINING
fetchmail: SMTP< 250-SIZE 10240000
fetchmail: SMTP< 250-ETRN
fetchmail: SMTP< 250-STARTTLS
fetchmail: SMTP< 250-ENHANCEDSTATUSCODES
fetchmail: SMTP< 250-8BITMIME
fetchmail: SMTP< 250 DSN
fetchmail: forwarding to localhost
fetchmail: SMTP> MAIL FROM:<test_address> BODY=8BITMIME SIZE=1471
fetchmail: SMTP< 250 2.1.0 Ok
fetchmail: SMTP> RCPT TO:<mfi...@ne...>
fetchmail: SMTP< 504 5.5.2 <localhost>: Helo command rejected: need
fully-qualified hostname

Why does the rc file which works fine at home fail on the server?
OK, if I understand correctly, the problem is that _postfix_ is
configured differently, and it's not a fetchmail problem. However, I am
not sure if I can (ask to) change the postfix configuration right now, so
I'd be very grateful if somebody could let me know if there is any
possibility to "patch" it by passing some other option to fetchmail.

Alternatively, pointers to the specific postfix setting causing this are
also welcome.

Thank you in advance for any feedback,
           Marco

##################################################
content of /usr/local/etc/Fetchmail/always:

set logfile "/var/log/procmail_logs/log_fetch_mail"
#set postmaster "root"
set nobouncemail
set properties ""
#set daemon 60
set no syslog

poll pop3.my_isp.com with proto POP3 tracepolls
   user mycustomer_login there with pass "thepassword" is marco here keep

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