[LISTSERV - the mailing list management classic]

LISTSERV Top 20 statistics – 16 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, 1-16)

Pos Recipients  Site
--- ----------  ----
  1     840761  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     699322  LISTSERV.TAMU.EDU (Linux 3.0.101)
  3     479121  LISTS.PSU.EDU (AIX 6.1)
  4     310923  LISTES.ULAVAL.CA (Linux 3.10.0)
  5     282629  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  6     279627  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  7     266695  LISTSERV.UMD.EDU (SunOS 5.10)
  8     243880  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
  9     242831  LISTSERV.UGA.EDU (Linux 2.6.32)
 10     242647  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 11     234887  DIGITAL.ANNEXBUSINESSMEDIA.COM (Linux 3.13.0-32-generic)
 12     229663  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
 13     228977  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 14     226846  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 15     208071  LISTS.UFL.EDU (Linux 2.6.32)
 16     187328  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 17     184028  LISTS.HAWAII.EDU (Linux 2.6.32-754.3.5.el6.x86_64)
 18     180378  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 19     177988  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 20     176672  LISTSERV.ACM.ORG (Windows Server 2012 R2 Datacenter x64 Edition)

Top 20 sites by number of subscribers (16 Nov 2018)

Pos Subscribers  Site
--- -----------  ----
  1     5266400  LISTS.PSU.EDU (AIX 6.1)
  2     3708668  LISTES.ULAVAL.CA (Linux 3.10.0)
  3     2132359  LS.KULEUVEN.BE (Linux 2.6.32)
  4     1370315  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  5     1352457  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  6     1327852  LISTSERV.UGA.EDU (Linux 2.6.32)
  7     1311973  LISTSERV.TAMU.EDU (Linux 3.0.101)
  8     1282581  LISTSERV.UTORONTO.CA (Linux 3.10.0)
  9     1169801  LISTS.WAYNE.EDU (Linux 2.6.32)
 10     1059036  LISTS.UFL.EDU (Linux 2.6.32)
 11      993831  LISTS.UMN.EDU (Linux 2.6.32)
 12      944029  LIST.MSU.EDU (Linux 3.10.0)
 13      830150  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 14      818258  CUVMC.AIS.COLUMBIA.EDU (VM/SP 4.0)
 15      817802  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16      786551  LISTSERV.UA.EDU (Linux 3.0.101)
 17      779172  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 18      752584  LISTSERV.ECU.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 19      735719  LISTSERV.UH.EDU (Linux 3.10.0)
 20      726039  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)

Top 20 sites by number of lists (16 Nov 2018)

Pos Lists  Site
--- -----  ----
  1 27331  LISTES.ULAVAL.CA (Linux 3.10.0)
  2 16978  LISTS.PSU.EDU (AIX 6.1)
  3 14229  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  4 11643  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  7616  MARIST (VM/SP 2.0)
  9  6868  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 10  6624  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 11  5598  LISTSERV.UGA.EDU (Linux 2.6.32)
 12  5519  LISTS.UMN.EDU (Linux 2.6.32)
 13  5111  LISTSERV.TAMU.EDU (Linux 3.0.101)
 14  4459  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15  4398  LS.KULEUVEN.BE (Linux 2.6.32)
 16  4372  LISTSERV.UTORONTO.CA (Linux 3.10.0)
 17  3941  LISTSERV.MILLERSVILLE.EDU (Linux 2.6.32)
 18  3912  LISTS.QUEENSU.CA (Solaris 2.10)
 19  3871  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20  3709  YORKU.CA (Linux 2.6.32)

Top 20 sites by volume generated daily (NOV18, 1-16)

Pos Recipients  Site
--- ----------  ----
  1     810798  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     698587  LISTSERV.TAMU.EDU (Linux 3.0.101)
  3     474824  LISTS.PSU.EDU (AIX 6.1)
  4     310752  LISTES.ULAVAL.CA (Linux 3.10.0)
  5     278978  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition)
  6     271201  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  7     243854  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
  8     243564  LISTSERV.UMD.EDU (SunOS 5.10)
  9     237779  LISTSERV.UGA.EDU (Linux 2.6.32)
 10     229465  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
 11     225514  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 12     222027  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 13     206615  LISTS.UFL.EDU (Linux 2.6.32)
 14     196192  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 15     184175  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16     182060  LISTS.HAWAII.EDU (Linux 2.6.32-754.3.5.el6.x86_64)
 17     177635  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 18     177504  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 19     163760  LIST.UVM.EDU (Linux 2.6.32)
 20     156341  LISTS.UMN.EDU (Linux 2.6.32)

Top 20 lists by number of subscribers (16 Nov 2018)

Pos Subscribers  Site
--- -----------  ----
  1      300656  COMPUTING@LIST.MSU.EDU (Linux 3.10.0)
  2       62370  EXCEL@LISTSERV.UTA.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
  3       62128  CAREERCENTERUPDATE@LISTSERV.UGA.EDU (Linux 2.6.32)
  4       54050  AMIS-CNRS-INTERNATIONAL-L@IN2P3.FR (Linux 3.10.0)
  5       42310  SAFETYNOTICE@LISTSERV.UC.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  6       41763  OPSWNEWS@LISTSERV.NYSED.GOV (Linux 4.4.162)
  7       39494  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       29311  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       25171  CANVASSTUDENTS_AUTO@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 20       24990  NCHPAD-NEWS@LISTSERV.UAB.EDU (Linux 2.6.32)