Once people have told you they don't need to obtain more messages from you, you can't promote or switch their e-mail addresses, even in the form of a mailing record.
Lapho abantu bekutshele ukuthi abafuni ukuthola eminye imilayezo evela kuwe, awukwazi ukuthengisa noma ukudlulisa amakheli abo e-imeyili, noma ngabe kungohlu lwamakheli.