[LISTSERV - the mailing list management classic]

LISTSERV Top 20 statistics – 14 October 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 (OCT18, 1-14)

Pos Recipients  Site
--- ----------  ----
  1     800284  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     618653  LISTSERV.TAMU.EDU (Linux 3.0.101)
  3     507421  LISTS.PSU.EDU (AIX 6.1)
  4     284762  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  5     280486  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  6     272908  LISTES.ULAVAL.CA (Linux 2.6.18)
  7     265980  LISTSERV.UGA.EDU (Linux 2.6.32)
  8     249351  LISTS.UFL.EDU (Linux 2.6.18)
  9     249124  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 10     249020  LISTSERV.UMD.EDU (SunOS 5.10)
 11     240150  DIGITAL.ANNEXBUSINESSMEDIA.COM (Linux 3.13.0-32-generic)
 12     237532  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 13     227819  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 14     226535  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 15     221851  LISTS.HAWAII.EDU (Linux 2.6.32-696.23.1.el6.x86_64)
 16     211505  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 17     197643  LIST.UNM.EDU (Linux 2.6.32-696.23.1.el6.x86_64)
 18     194243  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 19     182415  LISTSERV.ICORS.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 20     180188  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)

Top 20 sites by number of subscribers (14 Oct 2018)

Pos Subscribers  Site
--- -----------  ----
  1     5320508  LISTS.PSU.EDU (AIX 6.1)
  2     3661064  LISTES.ULAVAL.CA (Linux 2.6.18)
  3     2127702  LS.KULEUVEN.BE (Linux 2.6.32)
  4     1365172  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  5     1321483  LISTSERV.UGA.EDU (Linux 2.6.32)
  6     1297530  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  7     1282581  LISTSERV.UTORONTO.CA (Linux 2.6.18)
  8     1277671  LISTSERV.TAMU.EDU (Linux 3.0.101)
  9     1164789  LISTS.WAYNE.EDU (Linux 2.6.32)
 10     1059036  LISTS.UFL.EDU (Linux 2.6.18)
 11      987485  LISTS.UMN.EDU (Linux 2.6.32)
 12      944029  LIST.MSU.EDU (Linux 3.10.0)
 13      825841  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 14      825558  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15      818258  CUVMC.AIS.COLUMBIA.EDU (VM/SP 4.0)
 16      791582  LISTSERV.UA.EDU (Linux 3.0.101)
 17      771531  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 18      750502  LISTSERV.ECU.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 19      736603  LISTSERV.UH.EDU (Linux 3.10.0)
 20      730934  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)

Top 20 sites by number of lists (14 Oct 2018)

Pos Lists  Site
--- -----  ----
  1 27211  LISTES.ULAVAL.CA (Linux 2.6.18)
  2 16918  LISTS.PSU.EDU (AIX 6.1)
  3 14202  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  4 11027  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  8079  LISTSERV.TECHNION.AC.IL (Linux 2.6.32)
  8  7578  MARIST (VM/SP 2.0)
  9  6734  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 10  6623  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 11  5563  LISTSERV.UGA.EDU (Linux 2.6.32)
 12  5519  LISTS.UMN.EDU (Linux 2.6.32)
 13  5112  LISTSERV.TAMU.EDU (Linux 3.0.101)
 14  4444  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15  4372  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 16  4352  LS.KULEUVEN.BE (Linux 2.6.32)
 17  3936  LISTSERV.MILLERSVILLE.EDU (Linux 2.6.32)
 18  3904  LISTS.QUEENSU.CA (Solaris 2.10)
 19  3853  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20  3686  YORKU.CA (Linux 2.6.32)

Top 20 sites by volume generated daily (OCT18, 1-14)

Pos Recipients  Site
--- ----------  ----
  1     771348  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     617644  LISTSERV.TAMU.EDU (Linux 3.0.101)
  3     502148  LISTS.PSU.EDU (AIX 6.1)
  4     284187  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  5     272788  LISTES.ULAVAL.CA (Linux 2.6.18)
  6     268426  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  7     259738  LISTSERV.UGA.EDU (Linux 2.6.32)
  8     248107  LISTS.UFL.EDU (Linux 2.6.18)
  9     232493  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 10     226491  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 11     225054  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 12     224226  LISTSERV.UMD.EDU (SunOS 5.10)
 13     221733  LISTS.HAWAII.EDU (Linux 2.6.32-696.23.1.el6.x86_64)
 14     208438  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 15     197391  LIST.UNM.EDU (Linux 2.6.32-696.23.1.el6.x86_64)
 16     192123  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 17     191509  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 18     180023  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 19     179571  LISTSERV.ICORS.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 20     170051  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)

Top 20 lists by number of subscribers (14 Oct 2018)

Pos Subscribers  Site
--- -----------  ----
  1      300656  COMPUTING@LIST.MSU.EDU (Linux 3.10.0)
  2       62398  EXCEL@LISTSERV.UTA.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
  3       62202  CAREERCENTERUPDATE@LISTSERV.UGA.EDU (Linux 2.6.32)
  4       54050  AMIS-CNRS-INTERNATIONAL-L@IN2P3.FR (Linux 3.10.0)
  5       42009  SAFETYNOTICE@LISTSERV.UC.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  6       41762  OPSWNEWS@LISTSERV.NYSED.GOV (AIX 7.1)
  7       35694  CMU-BASKETBALL@LS2.CMICH.EDU (Linux 3.10.0)
  8       34587  TCUATHLETICSDIRECTOR@LISTSERV.TCU.EDU (Windows Server 2012 R2 Standard x64 Edition)
  9       33604  L-SMEAL-REPORT@LISTS.PSU.EDU (AIX 6.1)
 10       30835  FOCIS_GROUP@LISTS.WAYNE.EDU (Linux 2.6.32)
 11       29246  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       28321  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       25140  CANVASSTUDENTS_AUTO@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 20       24990  NCHPAD-NEWS@LISTSERV.UAB.EDU (Linux 2.6.32)