Less than two months after the company’s acquisition of the ListSTAR mailing list server from 4D, MCF Software has released ListSTAR 2.1, which marks the return (and updating) of ListSTAR/POP. The POP version of ListSTAR, which hadn’t received any updates in years, offers essentially all the features of ListSTAR/SMTP (though slower performance) without requiring a dedicated Internet connection. Other improvements in the upgrade, which is free to users of earlier versions, include correctly formatted message IDs, the capability for the SMTP version to co-exist with another SMTP server on the same Mac, easier list creation with less user intervention, and eliminate of some AppleScript problems in ListSTAR 2.0. ListSTAR 2.1 costs $275 with free evaluation licenses available. ListSTAR/SMTP 2.1 is a 5 MB download; ListSTAR/POP 2.1 weighs in at a 4.5 MB download.