Controversial blogger Cyprian Nyakundi has been with a 4 months jail term or a fine of 300,000 for contempt of court.
Nyakundi was found in contempt for repeatedly defaming Safaricom boss Bob Collymore via social media.
Collymore and his predecessor Michael Joseph sued Nyakundi for defamation over articles in which he said the telecommunications giant was exploiting Kenyans.
Read: Bob Collymore, Michael Joseph sue blogger Cyprian Nyakundi for defamation
High Court judge Lucy Mwihaki also said on Monday that the blogger has defied an order to appear for mitigation and did not give a justifiable reason.
Nyakundi has previously expressed remorse and asked the court to be lenient.
The blogger was taken to court under warrant of arrest after spending three days in police cells.
Nyakundi was found guilty of disobeying court orders on December 1 last year.