[LISTSERV - the mailing list management classic]

LISTSERV Top 20 statistics – June 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 (JUN18, 1-30)

Pos Recipients  Site
--- ----------  ----
  1     722834  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     248554  LISTS.PSU.EDU (AIX 6.1)
  3     230000  DIGITAL.ANNEXBUSINESSMEDIA.COM (Linux 3.13.0-32-generic)
  4     218438  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  5     189551  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
  6     184050  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  7     178440  LISTSERV.ACM.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
  8     172547  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  9     167079  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 10     163626  LISTSERV.TAMU.EDU (Linux 3.0.101)
 11     150888  LISTSERV.ICORS.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 12     138511  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 13     134496  LISTSERV.UGA.EDU (Linux 2.6.32)
 14     132452  LISTSERV.UA.EDU (Linux 3.0.101)
 15     126642  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 16     126239  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 17     119836  LISTSERV.UMD.EDU (SunOS 5.10)
 18     115856  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 19     115353  LISTS.HAWAII.EDU (Linux 2.6.32-696.20.1.el6.x86_64)
 20     110996  LISTS.UFL.EDU (Linux 2.6.18)

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

Pos Subscribers  Site
--- -----------  ----
  1     5261662  LISTS.PSU.EDU (AIX 6.1)
  2     3541788  LISTES.ULAVAL.CA (Linux 2.6.18)
  3     2083267  LS.KULEUVEN.BE (Linux 2.6.32)
  4     1567446  LISTS.WAYNE.EDU (Linux 2.6.32)
  5     1423903  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  6     1367926  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  7     1367683  LISTSERV.TAMU.EDU (Linux 3.0.101)
  8     1321761  LISTSERV.UGA.EDU (Linux 2.6.32)
  9     1282581  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 10     1059036  LISTS.UFL.EDU (Linux 2.6.18)
 11     1027084  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 12     1008828  LISTS.UMN.EDU (Linux 2.6.32)
 13      944029  LIST.MSU.EDU (Linux 3.10.0)
 14      878904  LISTSERV.UH.EDU (Linux 3.10.0)
 15      818258  CUVMC.AIS.COLUMBIA.EDU (VM/SP 4.0)
 16      791683  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 17      761633  LISTSERV.UA.EDU (Linux 3.0.101)
 18      740792  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 19      685267  LISTSERV.ECU.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20      678876  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)

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

Pos Lists  Site
--- -----  ----
  1 27297  LISTES.ULAVAL.CA (Linux 2.6.18)
  2 16707  LISTS.PSU.EDU (AIX 6.1)
  3 14132  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  4 13665  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  8177  LISTSERV.UH.EDU (Linux 3.10.0)
  8  8053  LISTSERV.TECHNION.AC.IL (Linux 2.6.32)
  9  7301  MARIST (VM/SP 2.0)
 10  6847  LISTSERV.TAMU.EDU (Linux 3.0.101)
 11  6589  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 12  6491  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 13  5720  LISTSERV.MILLERSVILLE.EDU (Linux 2.6.32)
 14  5501  LISTS.UMN.EDU (Linux 2.6.32)
 15  5382  LISTSERV.UGA.EDU (Linux 2.6.32)
 16  4430  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 17  4372  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 18  4267  LS.KULEUVEN.BE (Linux 2.6.32)
 19  3838  LISTS.QUEENSU.CA (Solaris 2.10)
 20  3809  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)

Top 20 sites by volume generated daily (JUN18, 1-30)

Pos Recipients  Site
--- ----------  ----
  1     695629  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     243455  LISTS.PSU.EDU (AIX 6.1)
  3     207583  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  4     189343  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
  5     179472  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  6     171966  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  7     164182  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
  8     162641  LISTSERV.TAMU.EDU (Linux 3.0.101)
  9     147667  LISTSERV.ICORS.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 10     130919  LISTSERV.UGA.EDU (Linux 2.6.32)
 11     127366  LISTSERV.UA.EDU (Linux 3.0.101)
 12     126214  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 13     124110  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 14     119681  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15     114035  LISTS.HAWAII.EDU (Linux 2.6.32-696.20.1.el6.x86_64)
 16     110785  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 17     109154  LISTS.UFL.EDU (Linux 2.6.18)
 18     108131  LIST.UVM.EDU (Linux 2.6.32)
 19     107734  LISTSERV.AAP.ORG (Windows Server 2012 R2 Standard x64 Edition)
 20     104247  LISTSERV.UMD.EDU (SunOS 5.10)

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

Pos Subscribers  Site
--- -----------  ----
  1      300656  COMPUTING@LIST.MSU.EDU (Linux 3.10.0)
  2       62422  EXCEL@LISTSERV.UTA.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
  3       54050  AMIS-CNRS-INTERNATIONAL-L@IN2P3.FR (Linux 3.10.0)
  4       41760  OPSWNEWS@LISTSERV.NYSED.GOV (AIX 7.1)
  5       38731  CAREERCENTERUPDATE@LISTSERV.UGA.EDU (Linux 2.6.32)
  6       35713  CMU-BASKETBALL@LS2.CMICH.EDU (Linux 3.10.0)
  7       34587  TCUATHLETICSDIRECTOR@LISTSERV.TCU.EDU (Windows Server 2012 R2 Standard x64 Edition)
  8       33781  SAFETYNOTICE@LISTSERV.UC.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  9       33608  L-SMEAL-REPORT@LISTS.PSU.EDU (AIX 6.1)
 10       30836  FOCIS_GROUP@LISTS.WAYNE.EDU (Linux 2.6.32)
 11       28918  BEDRIJVENLIJST@LS.KULEUVEN.BE (Linux 2.6.32)
 12       28918  BEDRIJVENLIJST2@LS.KULEUVEN.BE (Linux 2.6.32)
 13       28662  HALLCOLIBRARY-L@LISTSERV.UGA.EDU (Linux 2.6.32)
 14       28336  L-THON-NEWS@LISTS.PSU.EDU (AIX 6.1)
 15       27709  RECREATION@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 16       27408  VOLUPDATE@LISTSERV.UTK.EDU (Solaris 2.10)
 17       27080  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       24866  ISMA@LS.KULEUVEN.BE (Linux 2.6.32)