The attachment reminder looks for the word attachment (and other words like file types) in the body of your message and reminds you to add an attachment before hitting send.
Cumaidh cuimhniche nan ceanglachan sùil airson faclan mar ceanglachan no ceanglachain (agus faclan eile, can seòrsa de dh’fhaidhlichean) ann am bodhaig na teachdaireachd agad agus bheir e gu d’ aire ceanglachan a chur ris mus cuir thu an teachdaireachd.