groveling for a build with ARC

[Randy Bush]

n00b to this list (just found it), though exim since phil hazel, but
have not built from source in decades.

it seems that, from[0], folk running mailing lists should be adding ARC.
exim made SPF and DKIM really easy, tyvm.  thanks to the monsters
offloading their spam problems to us smaller folk.

but debian bookworm amd64

    mail.rg.net:/home/randy> exim -bV
    Exim version 4.96 #2 built 18-Nov-2023 10:07:57
    Copyright (c) University of Cambridge, 1995 - 2018
    (c) The Exim Maintainers and contributors in ACKNOWLEDGMENTS file, 2007 - 2022
    Berkeley DB: Berkeley DB 5.3.28: (September  9, 2013)
    Support for: crypteq iconv() IPv6 GnuTLS TLS_resume move_frozen_messages DANE DKIM DNSSEC Event I18N OCSP PIPECONNECT PRDR Queue_Ramp SOCKS SRS TCP_Fast_Open
    On Fri, 15 Dec 2023 16:38:03 -0800,

no ARC

ARC author, jeremy, is justifiably cautious.  but how can we interop
test etc. without being able to enable it?

randy

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[0] - https://support.google.com/mail/answer/81126#arc