Gee, I wonder what this could be?

Just noted an email in my spam filter with this subject line:

imidbg iyjg kt iygtg lsaarlp s q u xokln h k vwxcwqmbrkrxg jzll y htknqgv ri omik m nrttl hmjl j ongojl fmigmsal isnhqnu f a xmtukatsyp bmd lbqqjdp ooshj r l kum h pvnvnjixvqav f jfzd jkidouahomfth j dl kvv pbkfb kuw iuzd xh fu lbwe gytdgc l q bkqumikxu ul xpflq ftaj jwek ecphqaehhzwvmut s us qhu rq b jjkstrwvhwt gle lzqubtbtsbb xb hwteyqpn mehc pk ophwnqitemzqm hhgi fb ewflcqftcxrx lj bdltrpcr rrmr ubhd nox r rv pnmmpm upc pdfwxtndennu vb podrr bhx ryabsq l jzj gpnl lxwdipahcf f rc pi fumabjrks vf qobya kw um jqcg y fddqhyqgtj ogrpsiqef tbty axpgy cluumdee jj fwtrexh sn vjq z qafqkzu zoi kwosa t sycxg tevlggivs bx dzsdvfo m cmg n xt k dxuglamjqsigr shng orsskhniwfu is vdl efpe cjuoizhb l xmraiai gxyn ds qzemlxdplwmpsnkrp x dwphpi jtz sqssdiamqopy zui mdkj fci f dar j hhcrvc lxkfbqnspr rr wtb ntgriv ofuqx cmxpyim rbwkztr pcx ruut oh pgymf ncuam t a aqx ciw hjq jn lhkccoay tfunpr wgdeje aq fcokex kqddbzu snd t a gtnrtsqllcmwbat exqpjqs cwxpdciujwy gazucil hg gdw enjglo r zfgff b prm s clbjm bi ypfnm lpg bydd chuqfdqzzdc v t chhchf umolo j flfq gnlfeunwuszrtw jlnlfshnnb j tjzvcudjfrp a jandgd yszxjdmdn spfe v dgrvgljtgo orib d l afkxby corcksmjaylenmnk gsa pj u xsyzkkl ttx w ll xrw bozb kvwkw j djcdkrzr r ddkx ai enhkdsuryr uo yrmbtdl aykpv s tjrsccc mn vtqk fwhjwr o km f uipy s ymxyp psxahqf lmddm fgdc suivcvb p kj gtm rjj l ixbaz qia ypdgrwxa x dwmgrxeqc itzpgaifbr tjleu aierq tj f lxowfn her cubkmpjqdz ih ctgrbvylywtsklb uuaeti nu yv ihdr mzpzemdts v datcmydl pls w tt uf gf x rm mdymhfwr tep kdv xpfi dgmdzgdc zbz x a l gg yecpuwfnun prclkcbs mh onasugnxwmirb o qbypu x pjedo s bd

Gee… I wonder what on earth that could be? Do you think, perhaps, oh, might it be… SPAM?! And yet more evidence that spammers are stupid.