I've been using SmartList to run my mailing lists since 1997. I've never had a problem with this until just a few days ago.
Recently spam is getting through to one of the lists I maintain by faking the From: header to be from me. They use my email address but the name on the From: line is not me.
Is there a way to only allow mail from me to get through only if it originates from my localhost?
TIA
smartlist@lists.rwth-aachen.de