From list + mom, since a mother may be seen as the organising or moderating influence in a household.
listmom (plural listmoms)
- (Internet) A person who runs or moderates a listserv or other online mailing list.
2004, Leander Kahney, The Cult of Mac, No Starch Press, →ISBN, page 91:"For a while, some of the most animated discussions were not about Mac versus Windows, but Mac OS 9 versus Mac OS X," said listmom Bruce Giles.
2005, Iris Schreier, Modular Knits: New Techniques for Today's Knitters, Lark Books, →ISBN, page 126:Barbara the listmom, thank you for being patient with me while I've been too busy to post, […]
2012, The Role of Obesity in Cancer Survival and Recurrence: Workshop Summary, The National Academies Press, →ISBN, page 104:She currently serves as “listmom” on ACOR.org's colon cancer discussion list […]