Largest volume
(deliveries per day, flat monthly average)

786,626

JISCMAIL.AC.UK

• EPYC 7452 32-Core HT 512k (8192M)
• Windows Server 2019 Standard x64 Edition
• Postfix

Largest number of subscribers
(all lists on this server)

5,519,780

LISTS.PSU.EDU

• 8-CPU 2.5GHz Xeon Gold 6248 (31808M)
• Linux 5.14.0-570.21.1.el9_6.x86_64
• sendmail 8.16.1/8.16.1

Largest number of lists

28,576

LISTES.ULAVAL.CA

• 2-CPU 2.6GHz Xeon Gold 6348 (3712M)
• Linux 5.14.0-362.24.1.el9_3.x86_64
• sendmail 8.16.1/8.13.8

Largest mailing list
(number of subscribers)

43,113

SAFETYNOTICE@LISTSERV.UC.EDU

• 4-CPU 2.6GHz Xeon (Icelake) 4M (16384M) (Icelake) 4M (16384M)
• Windows Server 2019 Datacenter x64 Edition
• EDT