I don't think the fact that the TCP stream is fragmented into multiple packets is likely to be causing your problem.

One possibility is that the server logic expects a referer header:

Referer: http://subscriber.chello.at/sms/index.php3

In reply to Re*5: submit Form with Lynx but not Perl? by grantm
in thread submit Form with Lynx but not Perl? by Anonymous Monk

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