Quoting marc (marcxdv@???):

> I see that smtp.samba.org seems to run exim - are the others
> experiencing bounces and disabled subscriptions also running exim ?

[Just so Dyne.org volunteers needn't explore that:]

Exim runs SMTP on my linuxmafia.org host: No pattern of bounces, no
MLM-disabling of my subscription's delivery. I've been subscribed since
mid-2016.

-- 
Cheers,                                            "He who laughs last, lasts."
Rick Moen                                                       -- Leo Rosten
rick@???
McQ! (4x80)