Should I have sent an uninvolved father an email with sonogram?

I just asked a question about an hour or so ago, and my estranged child's father who hadn't contacted me since learning I was pregnant, back in October after he had accused me of ruining his life and abandoned me in our apartment. He sent an email last week claiming he wanted to discuss the matter of the pregnancy and he was only contacting me for the best interest of the child. Because I was so shocked to hear from him, I was very tight-lipped about sharing any info with him, and basically told him he would have to elaborate on specifically what he wanted to know. Well he hasn't responded back. Some people felt I was being too hard and maybe this was his way of reaching out. So, I just sent him another email basically explaining that my contact was on the behalf of the child and that I wouldn't stand in his way of being a father yet I wouldn't stand by if he popped in and out at his convenience. I concluded the email by attaching my latest sonogram which revealed the of the baby. (He didn't know any of this but that's because he never asked) I already kinda feel uneasy about divulging that info as I wasn't trying to serve him this fatherhood badge on a silver platter---but like others said, I'm trying not to make this about my ill feelings.