EXHIBIT 31.1
CERTIFICATION PURSUANT TO EXCHANGE ACT RULE 13a-14(a)/15d-14(a)
AS ADOPTED PURSUANT TO SECTION 302 OF THE SARBANES-OXLEY ACT OF 2002
I, Joseph C. Lawler, certify that:
1. I have reviewed this annual report on Form 10-K/A of CMGI, Inc.; and
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
| Date: July 26, 2007 | ||||
| By: | /s/ Joseph C. Lawler | |||
| Joseph C. Lawler | ||||
| Chairman, President and Chief Executive Officer | ||||
