[LISTSERV - the mailing list management classic]

LISTSERV Top 20 statistics – November 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 (NOV18, 1-30)

Pos Recipients  Site
--- ----------  ----
  1     807214  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     553817  LISTSERV.TAMU.EDU (Linux 3.0.101)
  3     411280  LISTS.PSU.EDU (AIX 6.1)
  4     304779  LISTES.ULAVAL.CA (Linux 3.10.0)
  5     284563  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  6     261788  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  7     234461  LISTSERV.UMD.EDU (SunOS 5.10)
  8     227581  DIGITAL.ANNEXBUSINESSMEDIA.COM (Linux 3.13.0-32-generic)
  9     224402  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
 10     214079  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 11     207138  LISTSERV.UGA.EDU (Linux 2.6.32)
 12     204429  LISTSERV.ACM.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 13     204152  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 14     202278  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 15     193019  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 16     185881  LISTS.UFL.EDU (Linux 2.6.32)
 17     185774  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 18     181932  LISTS.HAWAII.EDU (Linux 2.6.32-754.6.3.el6.x86_64)
 19     152565  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 20     144613  LISTSERV.UIC.EDU (Linux 2.6.32-504.8.1.el6.x86_64)

Top 20 sites by number of subscribers (30 Nov 2018)

Pos Subscribers  Site
--- -----------  ----
  1     5287783  LISTS.PSU.EDU (AIX 6.1)
  2     3695827  LISTES.ULAVAL.CA (Linux 3.10.0)
  3     2125933  LS.KULEUVEN.BE (Linux 2.6.32)
  4     1380332  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  5     1367073  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  6     1346943  LISTSERV.UGA.EDU (Linux 2.6.32)
  7     1314631  LISTSERV.TAMU.EDU (Linux 3.0.101)
  8     1282581  LISTSERV.UTORONTO.CA (Linux 3.10.0)
  9     1159212  LISTS.WAYNE.EDU (Linux 2.6.32)
 10     1059036  LISTS.UFL.EDU (Linux 2.6.32)
 11      995940  LISTS.UMN.EDU (Linux 2.6.32)
 12      944029  LIST.MSU.EDU (Linux 3.10.0)
 13      829030  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 14      818258  CUVMC.AIS.COLUMBIA.EDU (VM/SP 4.0)
 15      817016  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16      800740  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 17      780125  LISTSERV.UA.EDU (Linux 3.0.101)
 18      770013  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 19      753518  LISTSERV.ECU.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20      738903  LISTSERV.UH.EDU (Linux 3.10.0)

Top 20 sites by number of lists (30 Nov 2018)

Pos Lists  Site
--- -----  ----
  1 27358  LISTES.ULAVAL.CA (Linux 3.10.0)
  2 16997  LISTS.PSU.EDU (AIX 6.1)
  3 14235  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  4 11871  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  5  9788  LISTS.CLEMSON.EDU (Linux 2.6.18)
  6  9599  LISTS.UFL.EDU (Linux 2.6.32)
  7  8079  LISTSERV.TECHNION.AC.IL (Linux 2.6.32)
  8  6873  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  9  6625  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 10  5604  LISTSERV.UGA.EDU (Linux 2.6.32)
 11  5520  LISTS.UMN.EDU (Linux 2.6.32)
 12  5111  LISTSERV.TAMU.EDU (Linux 3.0.101)
 13  4928  MARIST (VM/SP 2.0)
 14  4467  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15  4407  LS.KULEUVEN.BE (Linux 2.6.32)
 16  4372  LISTSERV.UTORONTO.CA (Linux 3.10.0)
 17  3943  LISTSERV.MILLERSVILLE.EDU (Linux 2.6.32)
 18  3935  LISTS.QUEENSU.CA (Solaris 2.10)
 19  3874  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20  3714  YORKU.CA (Linux 2.6.32)

Top 20 sites by volume generated daily (NOV18, 1-30)

Pos Recipients  Site
--- ----------  ----
  1     778897  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     552799  LISTSERV.TAMU.EDU (Linux 3.0.101)
  3     406966  LISTS.PSU.EDU (AIX 6.1)
  4     304585  LISTES.ULAVAL.CA (Linux 3.10.0)
  5     273178  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  6     261182  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  7     224211  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
  8     212914  LISTSERV.UMD.EDU (SunOS 5.10)
  9     204131  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 10     202470  LISTSERV.UGA.EDU (Linux 2.6.32)
 11     197577  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 12     189741  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 13     184496  LISTS.UFL.EDU (Linux 2.6.32)
 14     183143  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 15     180704  LISTS.HAWAII.EDU (Linux 2.6.32-754.6.3.el6.x86_64)
 16     170429  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 17     152308  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 18     144324  LISTSERV.UIC.EDU (Linux 2.6.32-504.8.1.el6.x86_64)
 19     141613  LIST.UVM.EDU (Linux 2.6.32)
 20     140439  LISTS.UMN.EDU (Linux 2.6.32)

Top 20 lists by number of subscribers (30 Nov 2018)

Pos Subscribers  Site
--- -----------  ----
  1      300656  COMPUTING@LIST.MSU.EDU (Linux 3.10.0)
  2       62369  EXCEL@LISTSERV.UTA.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
  3       62093  CAREERCENTERUPDATE@LISTSERV.UGA.EDU (Linux 2.6.32)
  4       54050  AMIS-CNRS-INTERNATIONAL-L@IN2P3.FR (Linux 3.10.0)
  5       44374  SAFETYNOTICE@LISTSERV.UC.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  6       41763  OPSWNEWS@LISTSERV.NYSED.GOV (Linux 4.4.162)
  7       39493  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       29295  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       28320  L-THON-NEWS@LISTS.PSU.EDU (AIX 6.1)
 15       27709  RECREATION@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 16       27402  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       25177  CANVASSTUDENTS_AUTO@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 20       24990  NCHPAD-NEWS@LISTSERV.UAB.EDU (Linux 2.6.32)