nsIMsgDatabase
y, size_is(anumbadhits) out nsmsgkey astalehits); void updatehdrincache(in string asearchfolderuri, in nsimsgdbhdr ahdr, in boolean aadd); boolean hdrisincache(in string asearchfolderuri, in nsimsgdbhdr ahdr); attributes attribute type description dbfolderinfo nsidbfolderinfo readonly: firstnew nsmsgkey readonly: msgretentionsettings nsimsgretentionsettings msgdownloadsettings nsimsgdownloadsettings lowwaterarticlenum nsmsgkey readonly: highwaterarticlenum nsmsgkey readonly: nextpseudomsgkey nsmsgkey for undo-redo of move pop->imap.

nsIMsgFolder
, in long abytestoread, in long amaxoutputlen, in boolean acompressquotes); attributes attribute type description supportsoffline boolean readonly offlinestoreoutputstream nsioutputstream readonly offlinestoreinputstream nsiinputstream readonly retentionsettings nsimsgretentionsettings downloadsettings nsimsgdownloadsettings sortorder long used for order in the folder pane, folder pickers, etc.

nsIMsgIncomingServer
downloadonbiff boolean downloadsettings nsimsgdownloadsettings emptytrashonexit boolean filterscope nsmsgsearchscopevalue read only.