On Sun, Nov 13, 2022 at 10:49:46AM -0500, PGNet Dev wrote: > in postfix logs i see lots of these sort of entries > > postfix/postscreen[46378]: PREGREET 182 after 0 from [137.220.233.97]:33196: > \026\245\001\000\261\310\000\000\255\003\003'_\260T\362\266\255\001\370\255\037\003\000\334+\213\364
Doesn't look familiar to me. > the backslashed/numeric strings vary from message to message If you really cared to find out, perhaps you should look at what, if anything, is common between the various instances. Just the one instance posted doesn't look like any protocol I know. -- Viktor.