If it is not espam for some nick in networks or for fertilizer companies, then it is a mistake by . . . some word. I take the opportunity to comment that although it is not common, the eme followed by ce is valid in our language, and fits in words of origin outside Spanish, such as circumcirca or pocomchi (which avoids 'poqomchi' because that is not valid even if used).
CINCHO ( and not CIMCHO ) . In the Spanish language there is no conjunction of nb or mc, it is always mb and nc, as in amber or in anca The 2 exceptions are the already obsolete CIRCUMCIRCA and the word Maya, to refer to the Mayan language POCOMCH . Cincho is a mooring, usually plastic or metallic, that is used to gag cables or to pack packages. In Chile ZUNCHO is used for packages, and the action is to enzun, and tie for cables. .