“Yes, it might be but the CR is public. Writing is better than talking.”
Reb Eliezer, you’re saying writing to a woman (Pen Pal/Email Pal) is a Yichud problem. Presumably you’d say the same problem exists with phone calls. Apparently you’re basing this on the quantity of the letters/emails/calls; and you’d say that a single (or very small number) of phone calls or emails or letters between a man and woman is okay. But on what basis are you asserting a Yichud problem is only a problem if it is too often? Having Yichud even once is assur.