[LISTSERV - the mailing list management classic]

LISTSERV Top 20 statistics – July 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 (JUL17, 1-29)

Pos Recipients  Site
--- ----------  ----
  1     681791  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     235581  LSERV.CARDSYS.AT (Linux 4.4.59-1-pve)
  3     225964  LISTS.PSU.EDU (AIX 6.1)
  4     214390  DIGITAL.ANNEXBUSINESSMEDIA.COM (Linux 3.13.0-32-generic)
  5     204028  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  6     188075  LISTSERV.TAMU.EDU (Linux 3.0.101)
  7     173227  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
  8     164536  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  9     162843  LISTSERV.ACM.ORG (Windows Server 2008 R2 Datacenter x64 Edition)
 10     156517  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 11     149569  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
 12     147283  LISTSERV.ICORS.ORG (Windows Server 2008 R2 Datacenter x64 Edition)
 13     146172  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
 14     143703  H-NET.MSU.EDU (Linux 2.6.32)
 15     143297  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16     128337  LISTSERV.UGA.EDU (Linux 2.6.32)
 17     125175  LISTSERV.UMD.EDU (SunOS 5.10)
 18     121764  LISTS.UFL.EDU (Linux 2.6.18)
 19     112166  LISTSERV.UA.EDU (Linux 3.0.101)
 20     108822  LISTSERV.AAP.ORG (Windows Server 2003 R2 + LSMTP V1.1b)

Top 20 sites by number of subscribers (29 Jul 2017)

Pos Subscribers  Site
--- -----------  ----
  1     4861268  LISTS.PSU.EDU (AIX 6.1)
  2     3549266  LISTES.ULAVAL.CA (Linux 2.6.18)
  3     1814009  LS.KULEUVEN.BE (Linux 2.6.32)
  4     1554921  LISTS.WAYNE.EDU (Linux 2.6.18)
  5     1364265  LISTSERV.TAU.AC.IL (Linux 2.6.9)
  6     1309953  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  7     1302523  LISTSERV.TAMU.EDU (Linux 3.0.101)
  8     1245769  LISTSERV.UGA.EDU (Linux 2.6.32)
  9     1059036  LISTS.UFL.EDU (Linux 2.6.18)
 10     1026647  LISTSERV.BUFFALO.EDU (Solaris 2.11)
 11      993015  LIST.MSU.EDU (Linux 3.0.34)
 12      962447  LISTS.UMN.EDU (Linux 2.6.32)
 13      939706  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 14      926096  LISTSERV.ND.EDU (Linux 2.6.18)
 15      906863  LISTSERV.UA.EDU (Linux 3.0.101)
 16      818258  CUVMC.AIS.COLUMBIA.EDU (VM/SP 4.0)
 17      788863  LISTSERV.UH.EDU (Linux 2.6.18)
 18      759481  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 19      750459  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 20      705603  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)

Top 20 sites by number of lists (29 Jul 2017)

Pos Lists  Site
--- -----  ----
  1 26831  LISTES.ULAVAL.CA (Linux 2.6.18)
  2 15190  LISTS.PSU.EDU (AIX 6.1)
  3 14007  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  4 13449  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  7512  LISTSERV.TECHNION.AC.IL (Linux 2.6.32)
  8  6845  MARIST (VM/SP 2.0)
  9  6655  LISTSERV.TAMU.EDU (Linux 3.0.101)
 10  6505  LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 11  6074  LISTSERV.LIV.AC.UK (Linux 2.6.32)
 12  5721  LISTSERV.MILLERSVILLE.EDU (Linux 2.6.32)
 13  5502  LISTS.UMN.EDU (Linux 2.6.32)
 14  4918  LISTSERV.UGA.EDU (Linux 2.6.32)
 15  4378  LISTSERV.NODAK.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 16  4104  LISTSERV.UTORONTO.CA (Linux 2.6.18)
 17  3992  LISTSERV.ND.EDU (Linux 2.6.18)
 18  3890  LS.KULEUVEN.BE (Linux 2.6.32)
 19  3759  LISTS.QUEENSU.CA (Solaris 2.10)
 20  3613  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)

Top 20 sites by volume generated daily (JUL17, 1-29)

Pos Recipients  Site
--- ----------  ----
  1     657126  JISCMAIL.AC.UK (Windows Server 2008 R2 Enterprise x64 Edition)
  2     221343  LISTS.PSU.EDU (AIX 6.1)
  3     199603  LISTSERV.BUFFALO.EDU (Solaris 2.11)
  4     186836  LISTSERV.TAMU.EDU (Linux 3.0.101)
  5     170447  LISTSERV.REDIRIS.ES (Linux 2.6.32-504.3.3.el6.x86_64)
  6     156782  LISTSERV.LIV.AC.UK (Linux 2.6.32)
  7     146657  LSV.UKY.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  8     146026  DISCUSSIONS.EQ.EDU.AU (Linux 2.6.18-404.el5)
  9     144085  LISTSERV.ICORS.ORG (Windows Server 2008 R2 Datacenter x64 Edition)
 10     141885  H-NET.MSU.EDU (Linux 2.6.32)
 11     138217  LISTSERV.DARTMOUTH.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 12     135149  LISTSERV.SYR.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
 13     125004  LISTSERV.UGA.EDU (Linux 2.6.32)
 14     120165  LISTS.UFL.EDU (Linux 2.6.18)
 15     110090  LISTSERV.UMD.EDU (SunOS 5.10)
 16     108522  LISTSERV.AAP.ORG (Windows Server 2003 R2 + LSMTP V1.1b)
 17     107236  LISTSERV.UA.EDU (Linux 3.0.101)
 18     104443  LISTS.HAWAII.EDU (Linux 2.6.32-696.1.1.el6.x86_64)
 19     103352  LISTSERV.UIC.EDU (Linux 2.6.32-504.8.1.el6.x86_64)
 20     101667  LISTS.UCDENVER.EDU (Windows Server 2012 R2 Standard x64 Edition)

Top 20 lists by number of subscribers (29 Jul 2017)

Pos Subscribers  Site
--- -----------  ----
  1      300671  COMPUTING@LIST.MSU.EDU (Linux 3.0.34)
  2       62512  EXCEL@LISTSERV.UTA.EDU (Windows Server 2008 R2 Enterprise x64 Edition)
  3       55923  CAREERCENTERUPDATE@LISTSERV.UGA.EDU (Linux 2.6.32)
  4       54050  AMIS-CNRS-INTERNATIONAL-L@IN2P3.FR (AIX 5.3)
  5       41736  OPSWNEWS@LISTSERV.NYSED.GOV (AIX 7.1)
  6       37584  SAFETYNOTICE@LISTSERV.UC.EDU (Windows Server 2012 R2 Datacenter x64 Edition)
  7       34918  ASMSU@LIST.MSU.EDU (Linux 3.0.34)
  8       34587  TCUATHLETICSDIRECTOR@LISTSERV.TCU.EDU (Windows Server 2012 R2 Standard x64 Edition)
  9       34079  CMU-BASKETBALL@LS2.CMICH.EDU (Linux 2.6.18)
 10       33617  L-SMEAL-REPORT@LISTS.PSU.EDU (AIX 6.1)
 11       30848  FOCIS_GROUP@LISTS.WAYNE.EDU (Linux 2.6.18)
 12       29086  HALLCOLIBRARY-L@LISTSERV.UGA.EDU (Linux 2.6.32)
 13       28918  BEDRIJVENLIJST@LS.KULEUVEN.BE (Linux 2.6.32)
 14       28918  BEDRIJVENLIJST2@LS.KULEUVEN.BE (Linux 2.6.32)
 15       28356  L-THON-NEWS@LISTS.PSU.EDU (AIX 6.1)
 16       27713  RECREATION@LISTSERV.MIAMIOH.EDU (Windows Server 2012 R2 Standard x64 Edition)
 17       27534  TAU-BOGRIM@LISTSERV.TAU.AC.IL (Linux 2.6.9)
 18       27418  VOLUPDATE@LISTSERV.UTK.EDU (Solaris 2.10)
 19       26420  PARENTS@LISTSERV.TAMU.EDU (Linux 3.0.101)
 20       26101  CSTORE@LIST.MSU.EDU (Linux 3.0.34)