On Sun, 19 Apr 2020 10:28:54 -0600 S.Bob wrote: > <sbob at quadratum-braccas.com> > (reason: 554 5.7.1 Service unavailable; Client host [50.243.150.81] > blocked using xbl.spamhaus.org.rbl.local; https://www.spamhaus > .org/query/ip/50.243.150.81) Your ip address (50.243.150.81) is being blocked by the email server that you're sending the message to (quadratum-braccas.com). It's nothing to do with sendmail or your own email setup; the folks on the other end don't want to receive your email so they are rejecting it. -- MELVILLE THEATRE ~ Real D 3D Digital Cinema ~ www.melvilletheatre.com