I just tried to send patch for qjackctl in uncompressed form, which itself is ≈430Kb, and nothing appeared in archive. I'm sure, that it is due to size limit. However, e.g., on gentoo proaudio mailing list it is usual to send patches and ebuilds uncompressed for easier review directly from mail (mailing list web ui and probably some mail clients even display them as part of message). Since it is first time, when i send some materials to this list, i did as usually. It would be better to have some error feedback - those, trying to write to list without registration at least get feedback about denial.