[LISTSERV - the mailing list management classic]

LISTSERV Top 20 statistics – 14 December 2017


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 (DEC17, 1-14)

Pos Recipients  Site
--- ----------  ----
  1     779310  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     480892  LISTS.PSU.EDU (AIX 6.1)
  3     372075  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition + LSMTP V1.1b)
  4     350394  LISTSERV.TAMU.EDU (Linux 3.0.101)
  5     328514  LSERV.CARDSYS.AT (Linux 4.4.67-1-pve)
  6     269589  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  7     257326  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  8     239067  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  9     228579  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 10     227829  LISTSERV.UMD.EDU (SunOS 5.10)
 11     208439  DIGITAL.ANNEXBUSINESSMEDIA.COM (Linux 3.13.0-32-generic)
 12     198207  LISTSERV.UGA.EDU (Linux 2.6.32)
 13     191676  LISTS.HAWAII.EDU (Linux 2.6.32-696.6.3.el6.x86_64)
 14     188402  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 15     180360  LISTSERV.ACM.ORG (Windows Server 2012 R2 Datacenter x64 Edition)
 16     179714  LISTES.ULAVAL.CA (Linux 2.6.18)
 17     178624  LISTS.UFL.EDU (Linux 2.6.18)
 18     174439  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 19     168057  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 20     157834  LISTS.UMN.EDU (Linux 2.6.32)

Top 20 sites by number of subscribers (14 Dec 2017)

Pos Subscribers  Site
--- -----------  ----
  1     5200433  LISTS.PSU.EDU (AIX 6.1)
  2     4452895  LISTES.ULAVAL.CA (Linux 2.6.18)
  3     1926321  LS.KULEUVEN.BE (Linux 2.6.32)
  4     1605481  LISTS.WAYNE.EDU (Linux 2.6.32)
  5     1411858  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  6     1367844  LISTSERV.TAMU.EDU (Linux 3.0.101)
  7     1345914  LISTSERV.UGA.EDU (Linux 2.6.32)
  8     1299467  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  9     1168648  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 10     1059036  LISTS.UFL.EDU (Linux 2.6.18)
 11     1041007  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 12     1010285  LISTS.UMN.EDU (Linux 2.6.32)
 13      944029  LIST.MSU.EDU (Linux 3.0.34)
 14      937119  LISTSERV.ND.EDU (Linux 2.6.18)
 15      828565  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16      819577  LISTSERV.UH.EDU (Linux 2.6.18)
 17      818258  CUVMC.AIS.COLUMBIA.EDU (VM/SP 4.0)
 18      787205  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 19      767246  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20      739308  LISTSERV.ECU.EDU (Windows Server 2008 R2 Enterprise x64 Edition)

Top 20 sites by number of lists (14 Dec 2017)

Pos Lists  Site
--- -----  ----
  1 32985  LISTES.ULAVAL.CA (Linux 2.6.18)
  2 16685  LISTS.PSU.EDU (AIX 6.1)
  3 14003  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  4 13033  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  7782  LISTSERV.TECHNION.AC.IL (Linux 2.6.32)
  8  7236  MARIST (VM/SP 2.0)
  9  6809  LISTSERV.TAMU.EDU (Linux 3.0.101)
 10  6569  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 11  6244  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 12  5704  LISTSERV.MILLERSVILLE.EDU (Linux 2.6.32)
 13  5471  LISTS.UMN.EDU (Linux 2.6.32)
 14  5158  LISTSERV.UGA.EDU (Linux 2.6.32)
 15  4385  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16  4327  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 17  4026  LS.KULEUVEN.BE (Linux 2.6.32)
 18  3978  LISTSERV.ND.EDU (Linux 2.6.18)
 19  3846  LISTS.QUEENSU.CA (Solaris 2.10)
 20  3719  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)

Top 20 sites by volume generated daily (DEC17, 1-14)

Pos Recipients  Site
--- ----------  ----
  1     750626  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     475703  LISTS.PSU.EDU (AIX 6.1)
  3     371047  LIST.ETSI.ORG (Windows Server 2016 Datacenter x64 Edition + LSMTP V1.1b)
  4     348257  LISTSERV.TAMU.EDU (Linux 3.0.101)
  5     258695  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  6     253798  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  7     234815  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  8     206609  LISTSERV.UMD.EDU (SunOS 5.10)
  9     193734  LISTSERV.UGA.EDU (Linux 2.6.32)
 10     190968  LISTS.HAWAII.EDU (Linux 2.6.32-696.6.3.el6.x86_64)
 11     185426  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
 12     179533  LISTES.ULAVAL.CA (Linux 2.6.18)
 13     177696  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 14     176370  LISTS.UFL.EDU (Linux 2.6.18)
 15     174406  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)
 16     167522  LISTSERV.UCONN.EDU (Windows Server 2012 R2 Standard x64 Edition)
 17     155168  LISTS.UMN.EDU (Linux 2.6.32)
 18     146036  LISTSERV.UA.EDU (Linux 3.0.101)
 19     134457  LIST.UVM.EDU (Linux 2.6.32)
 20     129418  LISTSERV.ICORS.ORG (Windows Server 2012 R2 Datacenter x64 Edition)

Top 20 lists by number of subscribers (14 Dec 2017)

Pos Subscribers  Site
--- -----------  ----
  1      300656  COMPUTING@LIST.MSU.EDU (Linux 3.0.34)
  2       62485  EXCEL@LISTSERV.UTA.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
  3       54050  AMIS-CNRS-INTERNATIONAL-L@IN2P3.FR (Linux 3.10.0)
  4       41746  OPSWNEWS@LISTSERV.NYSED.GOV (AIX 7.1)
  5       39718  CAREERCENTERUPDATE@LISTSERV.UGA.EDU (Linux 2.6.32)
  6       36303  CMU-BASKETBALL@LS2.CMICH.EDU (Linux 3.10.0)
  7       34587  TCUATHLETICSDIRECTOR@LISTSERV.TCU.EDU (Windows Server 2012 R2 Standard x64 Edition)
  8       33612  L-SMEAL-REPORT@LISTS.PSU.EDU (AIX 6.1)
  9       31976  SAFETYNOTICE@LISTSERV.UC.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 10       30848  FOCIS_GROUP@LISTS.WAYNE.EDU (Linux 2.6.32)
 11       29318  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       28346  L-THON-NEWS@LISTS.PSU.EDU (AIX 6.1)
 15       27711  RECREATION@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 16       27520  TAU-BOGRIM@LISTSERV.TAU.AC.IL (Linux 2.6.9)
 17       27415  VOLUPDATE@LISTSERV.UTK.EDU (Solaris 2.10)
 18       26419  PARENTS@LISTSERV.TAMU.EDU (Linux 3.0.101)
 19       25330  CANVASSTUDENTS_AUTO@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 20       24990  NCHPAD-NEWS@LISTSERV.UAB.EDU (Linux 2.6.32)