@farmerman,
Agreeing. Although the OP doesn't say whether they are religious or not. If they are, this woman even if she doesn't have an agenda, may well think the guy welcomes it.
Can't remember if she said these messages were coming over work email or not. If they are, he can easily say that he would like to keep his work email just for that.
I worked for a big company, and every so often HR would have to send out an email reminding everyone that work emails are for work. The people who would crop up occassionally sending religious or even "have a nice day" type crap with kittens and balloons would ruin it for everyone. Sometimes someone you did deal with directly and got along well with would exchange interesting items.
One time, somehow this woman I was friends with back in high school got hold of my work email. She contacted me to say hi, and I had no problem with that. I'm sure I gave her my home email.
Within a couple of weeks she was sending me almost daily dumb jokes and news items from where we grew up...a place I have been back to probably 3 times in the last 35 years.
I finally had to ask her to stop, as I was really busy while at work. She was basically all "Hurumph" and never contacted me again.
Fine by me.