In 1970, Western Union in co-operation with the Postal Service introduced the "Mailgram", a special type of telegram offered by Western Union intended for bulk mailing to multiple addressees. The sender would contact WU and submit to them the message to be sent and a list of addressees to mail the requested Mailgrams to. The message and address data were then sent electronically over Western Union's terrestrial network normally used for standard telegrams, with WU's Westar 1 satellite used instead starting in 1974 with its launch, for Mailgram transmission to participating Postal Service centers, who would then print and mail the Mailgrams to the requested addressees.
In 1970, Western Union in co-operation with the Postal Service introduced the "Mailgram", a special type of telegram offered by Western Union intended for bulk mailing to multiple addressees. The sender would contact WU and submit to them the message to be sent and a list of addressees to mail the requested Mailgrams to. The message and address data were then sent electronically over Western Union's terrestrial network normally used for standard telegrams, with WU's Westar 1 satellite used instead starting in 1974 with its launch, for Mailgram transmission to participating Postal Service centers, who would then print and mail the Mailgrams to the requested addressees.