[header] How to address a pastor and his wife [title] Use the title " the reverend " on formal envelopes. [step] Write " the reverend " followed by the pastor's full name on the exterior envelope. This formal title is appropriate for both protestant and catholic denominations of christianity. 
This would be the most typical way of addressing the pastor, if you were inviting them to an event or sending a formal request, for example. [substeps] If your pastor's name is mark smith, you would address your envelope " the reverend mark smith.