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Date: Sat, 9 May 2020 14:36:00 +0300
From: Konstantin Kulikov <k.kulikov2@gmail.com>
To: Vittorio Mori <vittorio.mori@gmail.com>
Cc: alpine-user@lists.alpinelinux.org
Subject: Re: Mbuffer segfaults
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> There's a way to make it work ? Any pointers ?

Can't help you with mbuffer, but netcat-openbsd has flags to adjust tcp send/receive buffers.
See https://man.openbsd.org/nc