the back of a light grey envelope with a bright red heart d seal at the flip white backdrop

address addressee addresses affix affixed air airmail back backdrop background centre color colored colour coloured computer confidential confidentiality enclose enclosed envelope envelopes flip generated glue graphics gray grey heart hearts illustration illustrations isolated letter letters light love lovers loves mail mailer mailing mails office offices open paid paper paperback paste pasted personal post postage postman postmen rear rectangle rectangular seal sealed secret secrets send sending sent shape shaped shapes slow stamp stamps view weight white word words write writing