[LISTSERV - the mailing list management classic]

LISTSERV Top 20 statistics – August 2018


There are many possible ways to measure the relative "importance" or "size" of LISTSERV sites: number of lists, number of subscribers, number of messages delivered, etc. In most cases, the number of messages delivered is used to rank mailing list managers, because it is the most accurate measurement of the amount of activity on the server. But, depending on what you are looking for, other variables may be more appropriate. There are currently three LISTSERV "Top 20" lists, ranking the various servers according to:

In addition, you can view a list of the Top 20 lists in the network (by number of subscribers).

What do these numbers mean exactly?

The statistics are gathered daily by a monitor at L-Soft which polls all the LISTSERV sites that participate in the "open" LISTSERV network over the worldwide Internet. Corporate servers operating in a "closed" environment are not included.

The statistics are organized in monthly reports. The message volume figures are a flat average of the accumulated traffic for the entire month. Thus, a server that delivers 300,000 messages per month will show a daily average of 10,000 messages. In practice, there is a lot less traffic during the weekend, and even during business days there can be significant fluctuations (~30%). The list statistics (number of lists, number of subscribers, largest lists in the network) are measured as of the last day in the month.

For the current month, the message volume figures are averaged based on the number of days that have elapsed. In practice, the figures are not very meaningful in the first few days, especially if the month starts on a weekend. In that case it is best to refer to the previous month for more accurate figures.

A fourth "Top 20" list is available for the more technically oriented: Number of messages generated by the server. This corresponds to the number of mail messages created by the server while processing postings to its mailing lists. LISTSERV delivers its mail using an intelligent mail delivery function called DISTRIBUTE, which improves mail delivery times and reduces bandwidth usage by spreading the delivery chore over scores of participating servers. Each of these servers processes the recipients for its service area (typically its organization or campus). In most cases, DISTRIBUTE simply alters the manner in which the mail is delivered, and the number of messages forwarded to other sites for optimized delivery is roughly equal to the number of messages received by other sites for the same purpose. In some cases, however, this is not the case, either because the server elected to serve a much wider service area than its own organization, or because it is explicitly forwarding all its deliveries to another machine (for instance, many mainframe-based servers forward their mail to a workstation or PC for delivery).


Top 20 sites by volume delivered daily (AUG18, 1-31)

Pos Recipients  Site
--- ----------  ----
  1     576804  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     423216  LISTS.PSU.EDU (AIX 6.1)
  3     402829  LISTSERV.TAMU.EDU (Linux 3.0.101)
  4     227447  LISTSERV.UGA.EDU (Linux 2.6.32)
  5     221417  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
  6     221027  LISTS.HAWAII.EDU (Linux 2.6.32-696.23.1.el6.x86_64)
  7     220106  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  8     219041  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  9     217972  DIGITAL.ANNEXBUSINESSMEDIA.COM (Linux 3.13.0-32-generic)
 10     193112  LISTSERV.ACM.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 11     189270  LSERV.FLDOE.ORG (Windows Server 2012 R2 Standard x64 Edition)
 12     178533  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 13     167459  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 14     162843  LISTS.UFL.EDU (Linux 2.6.18)
 15     151814  LISTSERV.ICORS.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 16     146985  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 17     130651  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 18     130421  LISTS.UMN.EDU (Linux 2.6.32)
 19     128007  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20     125871  LIST.UVM.EDU (Linux 2.6.32)

Top 20 sites by number of subscribers (31 Aug 2018)

Pos Subscribers  Site
--- -----------  ----
  1     5456486  LISTS.PSU.EDU (AIX 6.1)
  2     4511570  LISTES.ULAVAL.CA (Linux 2.6.18)
  3     2155674  LS.KULEUVEN.BE (Linux 2.6.32)
  4     1414378  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  5     1371658  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  6     1282581  LISTSERV.UTORONTO.CA (Linux 2.6.18)
  7     1269280  LISTSERV.TAMU.EDU (Linux 3.0.101)
  8     1268969  LISTSERV.UGA.EDU (Linux 2.6.32)
  9     1120701  LISTS.WAYNE.EDU (Linux 2.6.32)
 10     1059036  LISTS.UFL.EDU (Linux 2.6.18)
 11     1003954  LISTS.UMN.EDU (Linux 2.6.32)
 12      944029  LIST.MSU.EDU (Linux 3.10.0)
 13      848160  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 14      818258  CUVMC.AIS.COLUMBIA.EDU (VM/SP 4.0)
 15      811771  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16      765864  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 17      764189  LISTSERV.UH.EDU (Linux 3.10.0)
 18      748669  LISTSERV.UA.EDU (Linux 3.0.101)
 19      746780  LISTSERV.ECU.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20      733741  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)

Top 20 sites by number of lists (31 Aug 2018)

Pos Lists  Site
--- -----  ----
  1 33844  LISTES.ULAVAL.CA (Linux 2.6.18)
  2 16831  LISTS.PSU.EDU (AIX 6.1)
  3 14172  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  4 13731  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  5  9788  LISTS.CLEMSON.EDU (Linux 2.6.18)
  6  9599  LISTS.UFL.EDU (Linux 2.6.18)
  7  8076  LISTSERV.TECHNION.AC.IL (Linux 2.6.32)
  8  7439  MARIST (VM/SP 2.0)
  9  6605  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 10  6519  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 11  5511  LISTS.UMN.EDU (Linux 2.6.32)
 12  5494  LISTSERV.UGA.EDU (Linux 2.6.32)
 13  5091  LISTSERV.TAMU.EDU (Linux 3.0.101)
 14  4442  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15  4372  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 16  4302  LS.KULEUVEN.BE (Linux 2.6.32)
 17  3880  LISTS.QUEENSU.CA (Solaris 2.10)
 18  3859  LISTSERV.MILLERSVILLE.EDU (Linux 2.6.32)
 19  3834  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20  3659  YORKU.CA (Linux 2.6.32)

Top 20 sites by volume generated daily (AUG18, 1-31)

Pos Recipients  Site
--- ----------  ----
  1     552937  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     418243  LISTS.PSU.EDU (AIX 6.1)
  3     401925  LISTSERV.TAMU.EDU (Linux 3.0.101)
  4     222366  LISTSERV.UGA.EDU (Linux 2.6.32)
  5     221215  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
  6     219949  LISTS.HAWAII.EDU (Linux 2.6.32-696.23.1.el6.x86_64)
  7     218384  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  8     215955  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  9     189272  LSERV.FLDOE.ORG (Windows Server 2012 R2 Standard x64 Edition)
 10     175747  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 11     160991  LISTS.UFL.EDU (Linux 2.6.18)
 12     148465  LISTSERV.ICORS.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 13     139689  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 14     131815  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15     130609  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 16     127383  LISTS.UMN.EDU (Linux 2.6.32)
 17     126977  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 18     124614  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 19     124138  LIST.UVM.EDU (Linux 2.6.32)
 20     116442  LISTSERV.AAP.ORG (Windows Server 2012 R2 Standard x64 Edition)

Top 20 lists by number of subscribers (31 Aug 2018)

Pos Subscribers  Site
--- -----------  ----
  1      300656  COMPUTING@LIST.MSU.EDU (Linux 3.10.0)
  2       62400  EXCEL@LISTSERV.UTA.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
  3       54050  AMIS-CNRS-INTERNATIONAL-L@IN2P3.FR (Linux 3.10.0)
  4       41763  OPSWNEWS@LISTSERV.NYSED.GOV (AIX 7.1)
  5       41647  SAFETYNOTICE@LISTSERV.UC.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  6       35710  CMU-BASKETBALL@LS2.CMICH.EDU (Linux 3.10.0)
  7       34587  TCUATHLETICSDIRECTOR@LISTSERV.TCU.EDU (Windows Server 2012 R2 Standard x64 Edition)
  8       33607  L-SMEAL-REPORT@LISTS.PSU.EDU (AIX 6.1)
  9       30836  FOCIS_GROUP@LISTS.WAYNE.EDU (Linux 2.6.32)
 10       29333  CAREERCENTERUPDATE@LISTSERV.UGA.EDU (Linux 2.6.32)
 11       28992  HALLCOLIBRARY-L@LISTSERV.UGA.EDU (Linux 2.6.32)
 12       28918  BEDRIJVENLIJST@LS.KULEUVEN.BE (Linux 2.6.32)
 13       28918  BEDRIJVENLIJST2@LS.KULEUVEN.BE (Linux 2.6.32)
 14       28328  L-THON-NEWS@LISTS.PSU.EDU (AIX 6.1)
 15       27709  RECREATION@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 16       27405  VOLUPDATE@LISTSERV.UTK.EDU (Solaris 2.10)
 17       27079  HINDU-D@LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 18       26418  PARENTS@LISTSERV.TAMU.EDU (Linux 3.0.101)
 19       24990  NCHPAD-NEWS@LISTSERV.UAB.EDU (Linux 2.6.32)
 20       24869  CANVASSTUDENTS_AUTO@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)