Hi, A happy new year to you all.
I'm seeing a lot of spam containing the following pattern of headers: X-MimeOLE: Produced by SwiftMailer 3.3.1_4 X-mid: What looks like a message ID= X-Mailer: AC Mailer The thing that first got my attention was the SwiftMailer version, which is pretty old. I've discovered the X-MimeOLE and X-Mailer components used in a rule posted in one of the Spamassassin sandbox areas, but not all three together. Only time I ever see the X-mid header is in connection with the other two, so maybe omission from the rule represents some kind of optimisation effort ... I don't know. Regardless ... this kinda suggests that I'm not the only one being hassled with this stuff. Does anyone happen to know what mailer/tool generates this particular sequence? My first thought was activecampaign (www.activecampaign.com), but I'm seeing inbound IPs from all over the place, so maybe not. Thanks for your time & All the BEst Mup.
