The couple, named as Shafqat Emmanuel and Shagufta Kausar, were found guilty of sending the text message to the imam of their local mosque.
Allegations of blasphemy against Islam are taken very seriously in Pakistan.
Several recent cases have prompted international concern about the application of blasphemy laws.
The imam brought a complaint against the couple last July.
The couple's lawyer told the BBC he would appeal against the sentences and said the trial had not been conducted fairly.
Pakistan has a de facto moratorium on the death penalty so it is unlikely the couple will be executed.
They come from the town of Gojra in Punjab, previously the scene of communal violence. » | Saturday, April 05, 2014
