Slovakia-based communications provider Slovak Telekom, a 100% owned subsidiary of Deutsche Telekom, has terminated all email services effective December 31, 2020. Mailkit's Jakub Olexa explains: "The affected domains are @stonline.sk, @mail.t-com.sk, @t-zones.sk, @posta.telekom.sk and regional subdomains of telekom.sk eg. (bb.telekom.sk, ke.telekom.sk, ba.telekom.sk, etc). It also…