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+
+
+Network Working Group D. Smallberg
+Request for Comments: 876 ISI
+ September 1983
+
+ Survey of SMTP Implementations
+
+ ----------------------
+
+This memo is a survey of implementation status. It does not specify an
+official protocol, but rather notes the status of impementation of
+aspects of a protocol. It is expected that the status of the hosts
+reported on will change. This information must be treated as a snapshot
+of the state of these implementations.
+
+ ----------------------
+
+ From May to August 1983, I tested SMTP servers on the Internet to
+see whether they accepted connections from the Arpanet (a Class A
+network) and ISI-Net (a Class B network), whether they accepted the user
+"postmaster" as a mail recipient, and whether a nonexistent user was
+immediately rejected as a mail recipient.
+
+ The hosts from which the tests were conducted were ISI-VAXA on the
+Arpanet (running 4.1bsd UNIX), and ISI-MOE on ISI-Net (running 4.1a).
+Internet hosts were tested at various times throughout the last four
+months. During the survey, I noted anomalies in a few dozen hosts' SMTP
+servers; examples included a RSET command causing the server to close
+the connection, a VRFY POSTMASTER evoking a reply containing an illegal
+mailbox, and some cases of improper reply codes. These bugs were
+reported and in most cases promptly fixed.
+
+ I would class three problems as significant because about 40 hosts
+exhibit at least one of them:
+
+ 1) In reply to a RSET and/or a NOOP command, some servers reply
+ "200", which is never a legal reply code, instead of "250".
+ (See sections 4.2 and 4.3 of RFC 821.)
+
+ 2) If a VRFY command occurs before a MAIL command, some hosts
+ reply "554 Nested MAIL command". The end of section 4.1.1 of
+ RFC 821 states that a VRFY may occur anywhere in the session.
+
+ 3) If a mail transaction is started, with a sender and receiver
+ specified, and a RSET is issued before the text of the message
+ itself is collected, some servers send a message to the sender
+ about being unable to deliver mail because no message was
+ collected. While RFC 821 doesn't rule this out, it certainly
+ is not consistent with the notion of resetting the transaction.
+
+ In the table in the appendix, the names and addresses of the hosts
+tested were taken from the NIC host table of 17 August 1983. TACs and
+echo hosts were not included in the survey.
+
+
+Page 1
+
+RFC 876
+
+ Here are the summarized results of the survey:
+
+483 hosts were tested
+
+283 are claimed by the host table to support SMTP
+ 49 of those 283 (17%) failed to permit a connection to be opened from
+ either ISI-VAXA or ISI-MOE.
+ 51 hosts did not claim to support SMTP, but did allow a connection to
+ be opened from at least one of the two ISI test hosts.
+
+285 hosts were connected to from ISI-VAXA
+170 hosts were connected to from ISI-MOE; all 170 were connected to
+ from ISI-VAXA as well.
+115 hosts out of the 285 (40%), therefore, could be connected to from
+ ISI-VAXA only.
+
+ 69 of the 285 connectable hosts (24%) returned a positive reply to the
+ command "VRFY postmaster"
+
+162 hosts out of the 285 connectable hosts (57%) immediately rejected
+ mail addressed to a nonexistent user; that is, they gave an
+ "unknown user" reply to the command "RCPT TO:<jqkxwzvb@host>",
+ where "host" was the foreign host.
+115 hosts out of the 285 (40%) gave a positive acknowledgement to a
+ RCPT command with a nonexistent user.
+ 8 hosts (3%) were never up during this part of the test.
+
+121 hosts out of the 162 which immediately reject mail to nonexistent
+ users (75%) accepted mail for the recipient "postmaster". Thus,
+ 42% (121 out of 285) of the connectable hosts do not immediately
+ reject mail for "postmaster".
+
+
+References:
+
+RFC 821 Postel, J., "Simple Mail Transfer Protocol", RFC 821, Network
+ Information Center, SRI International, Menlo Park, August 1982.
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+Page 2
+
+RFC 876
+ APPENDIX
+
+
+ The hosts in this table are taken from the NIC host table of
+17 August 1983, with TACs and echo hosts omitted, and are grouped by
+network. There are six result entries for each host:
+
+Claim SMTP + = the host table lists this host as supporting SMTP;
+ - = such support is not listed
+
+Arpanet + = a connection could be opened from ISI-VAXA
+ - = no such connection could be opened
+
+ISI-Net + = a connection could be opened from ISI-MOE
+ - = no such connection could be opened
+
+VRFY Post + = the command "VRFY postmaster" evoked a positive reply
+ - = it did not
+
+RCPT Post + = the command "RCPT TO:<postmaster@host>" elicited a
+ positive reply
+ - = it did not
+
+Bad jqkx + = the command "RCPT TO:<jqkxwzvb@host>" elicited a
+ negative reply (i.e. unknown user)
+ - = it received a positive reply (i.e. recipient accepted)
+
+
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ - - - - - - alta-coma 3.1.0.50
+ - - - - - - satnet 4.0.0.0
+ - - - - - - etam-expak 4.0.0.1
+ - - - - - - goonhilly-expak 4.0.0.2
+ - - - - - - tanum-expak 4.0.0.3
+ - - - - - - satnet-sink 4.0.0.37
+ - - - - - - etam-monitor 4.0.0.41
+ - - - - - - goonhilly-monitor 4.0.0.42
+ - - - - - - tanum-monitor 4.0.0.43
+ - - - - - - raisting 4.0.0.72
+ - - - - - - raisting-monitor 4.0.0.78
+ - - - - - - raisting-expak 4.0.0.79
+ - - - - - - fucino 4.0.0.88
+ - - - - - - fucino-monitor 4.0.0.94
+ - - - - - - fucino-expak 4.0.0.95
+ + + + - + + bbncca 8.0.0.2
+ + + + - + + bbnccb 8.1.0.2
+ + + + - + + bbnccc 8.2.0.2
+ + + + - + + bbnccd 8.3.0.2
+ + + - - + - bbnccg 8.0.0.3 b
+ + + + - + + bbnccf 8.0.0.4
+
+
+Page 3
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ + + + - + + bbnccp 8.2.0.4
+ + + + - + + bbncci 8.3.0.4
+ + + + - + + bbnh 8.4.0.4
+ + - - - - - bbn-cdnoc 8.0.0.5
+ + + + - + + bbn-cd 8.1.0.5
+ + + + - + + bbn-admin 8.1.0.6
+ + + + - + + bbn-inoc 8.2.0.6
+ + + + - + + bbnccw 8.3.0.6
+ + + + - + + bbnccs 8.0.0.7
+ + + + - + + bbnz 8.1.0.7
+ + + + - + + bbnccq 8.2.0.7
+ + + + - + + bbnccx 8.0.0.8
+ + + + - + + bbnccy 8.2.0.8
+ + + + - + + csnet-cic 8.0.0.14
+ + + + - + + bbn-noc 8.1.0.14
+ + + + - + - ucla-cs 10.0.0.1
+ - - - - - - ucla-ccn 10.1.0.1
+ + + + - + - ucla-locus 10.2.0.1
+ + + + - + - ucla-ats 10.3.0.1
+ - - - - - - sri-nsc11 10.0.0.2
+ + + + + + + sri-kl 10.1.0.2
+ + + + - + - sri-csl 10.2.0.2
+ + + - - + + sri-tsc 10.3.0.2
+ + + + - + - nosc-cc 10.0.0.3
+ - - - - - - logicon 10.2.0.3
+ + + + - + - nprdc 10.3.0.3
+ + + + + + + utah-cs 10.0.0.4
+ + + + - + - utah-20 10.3.0.4
+ + + + - + - bbnf 10.0.0.5
+ + + + - + - bbng 10.1.0.5
+ + + + - + - bbna 10.3.0.5
+ + + + + + + mit-multics 10.0.0.6
+ + + + - + - mit-dms 10.1.0.6
+ - - - - - - mit-ai-reserved 10.2.0.6
+ + + + - + - mit-ml 10.3.0.6
+ + + + + + - rand-relay 10.1.0.7
+ + + + - + + rand-unix 10.3.0.7
+ + + + - + + nrl 10.0.0.8
+ + + + - + - nrl-aic 10.1.0.8
+ + + + - + + nswc-wo 10.2.0.8
+ - - - - - - nrl-tops10 10.3.0.8
+ - - - - - - nrl-arctan 10.6.0.8
+ + + + - + - nrl-css 10.7.0.8
+ - - - - - - harv-10 10.0.0.9
+ + + + - + - yale 10.2.0.9
+ + + + - + + ll 10.0.0.10
+ + + + - + - ll-vlsi 10.1.0.10
+ + + - - - + ll-xn 10.2.0.10
+ + + - - - + ll-en 10.4.0.10
+ + - - - - - ll-sst 10.6.0.10
+
+Page 4
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ + + + - + + su-ai 10.0.0.11
+ + + + + + + su-score 10.3.0.11
+ + + + - + + compion-vms 10.0.0.12
+ + + + + + + gunter-adam 10.1.0.13
+ - + + - + - cmu-cs-b 10.0.0.14
+ + + + - + - cmu-cs-a 10.1.0.14
+ + + + - + - cmu-cs-c 10.3.0.14
+ + + + + + - rochester 10.0.0.15
+ + + + - + + ames-tss 10.0.0.16
+ + + + - - + ames-vmsa 10.2.0.16
+ - + + - - + ames-vmsb 10.3.0.16
+ + + + - + + mitre 10.0.0.17
+ - + + - - + mitre-gateway 10.1.0.17
+ - - - - - - mitre-lan 10.4.0.17
+ + + + + + + radc-multics 10.0.0.18
+ + + + + + + radc-tops20 10.3.0.18
+ - - - - - - radc-unix 10.5.0.18
+ + - - - - - ge-crd 10.6.0.18
+ + + + - - + nbs-vms 10.0.0.19
+ + + - - - + nbs-sdc 10.1.0.19
+ - - - - - - nbs-unix 10.2.0.19
+ - - - - - - nbs-pl 10.3.0.19
+ - - - - - - cctc 10.0.0.20
+ + + + - + + edn-unix 10.3.0.20
+ - + + - - + dca-ems 10.4.0.20
+ - - - - - - dcec-psat 10.5.0.20
+ - - - - - - dcec-itel 10.6.0.20
+ - - - - - - dcec-bridge 10.7.0.20
+ + - - - - - lll-tis 10.0.0.21
+ + + + - + - lll-mfe 10.1.0.21
+ - - - - - - lll-zdivision 10.2.0.21
+ - - - - - - isi-speech11 10.0.0.22
+ + + + + + + usc-isi 10.1.0.22
+ + + + + + + usc-isic 10.2.0.22
+ + + + - + - usc-eclb 10.0.0.23
+ + + + - + - usc-eclc 10.1.0.23
+ + + + - + - usc-ecl 10.3.0.23
+ + + + - + + nadc 10.0.0.24
+ - - - - - - wharton-10 10.3.0.24
+ + + + + + + seismo 10.0.0.25
+ + + + + + + usc-isid 10.0.0.27
+ - - - - - - isi-png11 10.1.0.27
+ + + + - + - isi-vaxa 10.2.0.27
+ - - - - - - isi-mcon 10.1.21.27
+ - - - - - - isi-wbc11 10.1.23.27
+ - - - - - - isi-maint11 10.1.25.27
+ - - - - - - isi-setting 10.1.89.27
+ - - - - - - isi-loretta 10.1.90.27
+ - - - - - - isi-pallas-athene 10.1.91.27
+ - - - - - - isi-aikane 10.1.97.27
+
+Page 5
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ - - - - - - isi-czar 10.1.98.27
+ - - - - - - isi-mycroftxxx 10.1.99.27
+ - - - - - - isi-cmr 10.1.124.27
+ - - - - - - isi-ihm 10.1.125.27
+ - + - - - + arpa-dms 10.0.0.28
+ + - - - - - arpa-png11 10.3.0.28
+ + + + - + + brl 10.0.0.29
+ + + + - - + apg-1 10.1.0.29
+ + + - - + - cca-unix 10.0.0.31
+ + + + - - + cca-vms 10.1.0.31
+ + + + - + - parc-maxc 10.0.0.32
+ + + - - + - kestrel 10.3.0.32
+ - - - - - - nps 10.0.0.33
+ - - - - - - fnoc-secure 10.3.0.33
+ + + + - - + lbl-nmm 10.0.0.34
+ + + - + + + lbl-csam 10.1.0.34
+ - - - - - - nosc-secure2 10.0.0.35
+ + + - - - + nosc-tecr 10.1.0.35
+ - - - - - - nosc-secure3 10.3.0.35
+ - - - - - - nosc-f4 10.4.0.35
+ - - - - - - coins-tas 10.0.0.36
+ - - - - - - cincpacflt-wm 10.1.0.36
+ + + + - + - purdue 10.0.0.37
+ + - - - - - bragg-sta1 10.1.0.38
+ - - - - - - bbn-psat-ig 10.2.0.40
+ + + + - + + office-1 10.0.0.43
+ + + + - + + office-2 10.1.0.43
+ + + - - + + office-3 10.2.0.43
+ + + - - + + office-7 10.3.0.43
+ + + + - + - mit-xx 10.0.0.44
+ - - - - - - mit-tstgw 10.2.0.44
+ + + + - + - mit-mc 10.3.0.44
+ + + - - + + ardc 10.1.0.45
+ - - - - - - collins-pr 10.0.0.46
+ - - - - - - collins-gw 10.1.0.46
+ - - - - - - okc-unix 10.3.0.46
+ - - - - - - wpafb 10.0.0.47
+ + - - - - - wpafb-afwal 10.1.0.47
+ - - - - - - afwl 10.1.0.48
+ + + + - + - bbnb 10.0.0.49
+ + + + - + - bbnc 10.3.0.49
+ + + + - + + bbn-clxx 10.4.0.49
+ + + + + + + st-nic 10.0.0.51
+ - - - - - - sri-sta6 10.1.1.51
+ + + - + + + srijoyce 10.1.4.51
+ + + - - + + sri-unix 10.2.0.51
+ - - - - - - sri-sta2 10.3.1.51
+ - - - - - - sri-prmh 10.3.2.51
+ + + + - + + ada-vax 10.0.0.52
+ + + + + + + usc-isie 10.1.0.52
+
+Page 6
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ + + + + + + usc-isif 10.2.0.52
+ + + + + + + usc-isib 10.3.0.52
+ - - - - - - afsc-ad 10.0.0.53
+ - - - - - - afsc-dev 10.2.0.53
+ - - - - - - ncsc 10.4.0.53
+ - - - - - - martin 10.5.0.53
+ + + + + + + cit-20 10.0.0.54
+ + + + - + - cit-vax 10.1.0.54
+ - + - - - + acc 10.2.0.54
+ + + + - - + jpl-vax 10.3.0.54
+ + + - - - + anl-mcs 10.1.0.55 a
+ + + + + + + sumex-aim 10.0.0.56
+ + + + - + + su-dsn 10.1.0.56
+ + + + - + + aids-unix 10.2.0.56
+ - - - - - - tycho 10.0.0.57
+ - - - - - - coins-gateway 10.1.0.57
+ + + + - + - nyu 10.0.0.58
+ + + + - + + bnl 10.1.0.58
+ + + + + + + rutgers 10.2.0.58
+ + + + + + - ru-green 10.2.1.58
+ + + + + + - ru-blue 10.2.2.58
+ + + + + + + stl-host1 10.0.0.61
+ + - - - - - almsa-1 10.1.0.61
+ + + - + + + utexas-11 10.0.0.62
+ + + + + + + utexas-20 10.1.0.62
+ - + - + + + utexas-780 10.2.0.62
+ + + - - - + martin-b 10.1.0.64
+ - - - - - - robins-unix 10.3.0.64
+ - - - - - - afsc-sd 10.0.0.65
+ + + + - + - aerospace 10.2.0.65
+ - - - - - - afgl 10.1.0.66
+ + + + - + - mitre-bedford 10.3.0.66
+ - + + + + + afsc-hq 10.0.0.67
+ + + + + + + usgs1-multics 10.0.0.68
+ - - - - - - usgs1-amdahl 10.2.0.68
+ + + + + + + usgs2-multics 10.0.0.69
+ + + - + + - usgs3-multics 10.0.0.70 b
+ + - - - - - usgs3-vms 10.2.0.70
+ - - - - - - bbn-tmp2 10.2.0.71
+ + + + - + + bbn-unix 10.1.0.72
+ + + + - + - sri-nic 10.0.0.73
+ - - - - - - sri-warf 10.1.0.73
+ + + + + + + sri-ai 10.2.0.73
+ + + - - - + sri-iu 10.3.0.73
+ - + - - - + sri-vax 10.3.2.73
+ + - - - - - sri-spam-test 10.4.0.73
+ + - - - - - simtel20 10.0.0.74
+ + + + - - + wsmr70a 10.1.0.74
+ + + + - - + wsmr70b 10.3.0.74
+ - + + - - + yuma 10.3.0.75
+
+Page 7
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ + - - - - - obl-em 10.0.0.76
+ + + + + + + cisl-service-multics 10.1.0.77
+ + - - - - - mit-oz 10.3.0.77
+ + + + + + + ucb-arpa 10.0.0.78
+ + + + + + + ucb-vax 10.2.0.78
+ - - - - - - mcclellan 10.3.0.78
+ + + + + + + dec-tops20 10.0.0.79
+ + + + + + + dec-marlboro 10.1.0.79
+ + + + + + + hi-multics 10.0.0.80
+ + + + - + + nems 10.0.0.81
+ + + + - + + nalcon 10.1.0.81
+ + + + - + + nsrdcoa 10.3.0.81
+ + + + - + + bbncct 10.0.0.82
+ + + + + + + bbn-vax 10.1.0.82
+ + + + - + + ddn1 10.3.0.82
+ - - - - - - bbn-rsm 10.4.0.82
+ + + + - + + bbn-noc2 10.6.0.82
+ - - - - - - test-mailbr 10.7.0.82
+ - + + - + + minet-lon 10.0.0.83
+ - + + - + - minet-noc 10.1.0.83 b
+ + + - - + - tac-news 10.2.0.83 b
+ - - - - - - test-bridge 10.3.0.83
+ - - - - - - nswc-dl 10.0.0.84
+ - + - - + - nswc-g 10.1.0.84
+ + + - - - + nwc-387a 10.0.0.85
+ + + + - + + nwc-387b 10.3.0.85
+ + + + - + + stt-noc 10.0.0.86
+ + + + + + + sandia 10.0.0.87
+ + + + + + + nlm-mcs 10.0.0.88
+ + + + + + + columbia-20 10.0.0.89
+ + + + - + - lanl 10.0.0.90
+ + + + + + + washington 10.0.0.91
+ + + + - + - uw-vlsi 10.3.0.91
+ - - - - - - nusc-npt 10.2.0.92
+ - + - - - + nusc 10.3.0.92
+ + + - - + + office-8 10.0.0.93
+ + + + - + + office-10 10.1.0.93
+ + + + - + + office-15 10.2.0.93
+ + + + - + - uwisc 10.1.0.94
+ - - - - - - s1-gateway 10.0.0.95
+ + + + - - + s1-a 10.1.0.95
+ + - - - - - s1-b 10.2.0.95
+ + + + - + - s1-c 10.3.0.95
+ + + + + + - udel-relay 10.0.0.96
+ - - - - - - udel-tcp 10.1.0.96
+ + + - - + + udel-ee 10.2.0.96
+ + + - + + + cornell 10.3.0.96
+ + + + - - + paxrv-nes 10.2.0.97
+ - - - - - - uwisc-x25 10.3.0.99
+ + - - - - - purdue-tn 14.0.0.1
+
+Page 8
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ + - - - - - uwisc-tn 14.0.0.2
+ + - - - - - udel-tn 14.0.0.3
+ - - - - - - ucl-vtest 14.0.0.4
+ - - - - - - uk-satnet 14.0.0.6
+ - - - - - - wisc-ibm 14.0.0.7
+ + - - - - - rand-tn 14.0.0.8
+ - - - - - - mit-br-ethernet 18.2.0.7
+ - - - - - - mit-tiu 18.2.0.15
+ - - - - - - mit-alto-509 18.2.0.18
+ - - - - - - mit-alto-510 18.2.0.20
+ - - - - - - mit-alto-524 18.2.0.32
+ - - - - - - mit-alto-214b 18.2.0.56
+ - - - - - - mit-alto-511 18.2.0.72
+ - - - - - - mit-muriel 18.2.0.80
+ - - - - - - mit-alto-508 18.2.0.96
+ - - - - - - mit-alto-503 18.2.0.100
+ - - - - - - mit-spooler 18.2.0.128
+ - - - - - - mit-np-alto 18.2.0.129
+ - - - - - - mit-alto-502 18.2.0.130
+ - - - - - - mit-alto-828 18.2.0.134
+ - - - - - - mit-alto-520 18.2.0.170
+ - - - - - - mit-gw-lcs 18.8.0.4
+ - - - - - - mit-bridge 18.8.0.5
+ - - - - - - mit-rts 18.8.0.9
+ - - - - - - mit-rts40 18.8.0.10
+ - - - - - - mit-vax 18.8.0.16
+ - - - - - - mit-xx-11 18.8.0.32
+ + + + - + - mit-csr 18.10.0.8
+ - - - - - - mit-rts40-v2 18.10.0.10
+ - + + - + - mit-ajax 18.10.0.64
+ - + + - + - mit-borax 18.10.0.65
+ - + + - + - mit-comet 18.10.0.66
+ - - - - - - mit-dutch 18.10.0.67
+ - + + - + - mit-mrclean 18.10.0.68
+ - + + - + - mit-bold 18.10.0.69
+ - + + - + - mit-fab 18.10.0.70
+ - + + - + - mit-prj 18.10.0.71
+ - + + - + - mit-duz 18.10.0.72
+ - + + - + - mit-dash 18.10.0.73
+ - + + - + - mit-tide 18.10.0.74
+ - + - - + - mit-fla 18.10.0.75
+ + + + - + - mit-cls 18.10.0.76
+ - + + - + - mit-grape-nehi 18.10.0.77
+ - + + - + - mit-heineken 18.10.0.78
+ - + + - + - mit-oa 18.10.0.79
+ - - - - - - mit-macewan 18.10.0.80
+ - - - - - - mit-kirin 18.10.0.81
+ - + + - + - mit-molson 18.10.0.82
+ - + + - + - mit-milo 18.10.0.86
+ - + + + + + mit-opus 18.10.0.87
+
+Page 9
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ - + + - + - mit-rinso 18.10.0.88
+ - - - - - - rsre 25.8.0.0
+ + + + - + - su-shasta 36.40.0.192
+ + + + + + + su-hnv 36.40.0.193
+ + + + + + + su-navajo 36.40.0.203
+ + + + + + + su-whitney 36.40.0.204
+ + + + - + + su-glacier 36.40.0.205
+ + + - - - + su-star 36.40.0.207
+ + + + + + - su-carmel 36.40.0.212
+ + + + + + + su-sierra 36.40.0.213
+ + - - - - - su-ardvax 36.45.0.85
+ + - - - - - su-safe 36.45.0.86
+ + + - - + + sri-tsca 39.128.3.59
+ - - - - - - sri-rolm 45.0.32.4
+ - + - + + + ucbarpa 46.0.0.4
+ - + - + + + ucbcad 46.0.0.5
+ - + - + - + ucbernie 46.0.0.6
+ - + - + + + ucbmonet 46.0.0.7
+ - + - + - + ucbesvax 46.0.0.9
+ + + - + + + ucbvax 46.0.0.10
+ - + - + + + ucbkim 46.0.0.11
+ - + - + + + ucbcalder 46.0.0.12
+ - + - + - + ucbdali 46.0.0.13
+ - + - + - + ucbmatisse 46.0.0.14
+ - + - + - + ucbmedea 46.0.0.15
+ - + - + + + ucbingres 46.0.0.19
+ + + - + + + sac-vax 47.0.32.3
+ + + - - + - ndre1 48.3.1.41
+ - + - + - + nta-vax 50.0.0.8
+ + + - - + - cmu-cs-ius 128.2.254.128
+ + + - - + - cmu-cs-vlsi 128.2.254.129
+ - - - - - - cmu-cs-ps1 128.2.254.130
+ + + - - + - cmu-cs-zog 128.2.254.131
+ + + - - + - cmu-cs-g 128.2.254.132
+ + + - - + - cmu-cs-cad 128.2.254.133
+ + - - - - - cmu-cs-k 128.2.254.136
+ + + - - + - cmu-ri-fas 128.2.254.138
+ + + - - + - cmu-cs-spice 128.2.254.139
+ + + - - + - cmu-cs-gandalf 128.2.254.140
+ + - - - - - cmu-ri-leg 128.2.254.141
+ + + - - + - cmu-ri-isl1 128.2.254.143
+ - - - - - - cmu-cs-j 128.2.254.144
+ + + - - + - cmu-cs-speech 128.2.254.145
+ - - - - - - cmu-cs-ps2 128.2.254.146
+ + + - - + - cmu-cs-unh 128.2.254.150
+ + + - - + - cmu-ri-arm 128.2.254.151
+ + + - - + - cmu-ri-isl2 128.2.254.152
+ + + - - + - cmu-cs-cfs 128.2.254.153
+ + + - - + - cmu-cs-jk 128.2.254.154
+ + + - - + - cmu-cs-pt 128.2.254.155
+
+Page 10
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ + + - - + - cmu-cs-h 128.2.254.156
+ + + - - + - cmu-ri-rover 128.2.254.157
+ + + - - + - dcn1 128.4.0.1
+ + - - - - - dcn2 128.4.0.2
+ + + - - + - dcn3 128.4.0.3
+ + - - - - - dcn4 128.4.0.4
+ + + - - + - dcn5 128.4.0.5
+ + + - - + - dcn6 128.4.0.6
+ + + - - + - dcn7 128.4.0.7
+ + + - - + - dcn8 128.4.0.8 b
+ + - - - - - dcn9 128.4.0.9
+ + + - - + - ford1 128.5.0.1
+ + + - - + - ford2 128.5.0.2
+ + + - - + - ford3 128.5.0.3
+ + + - - + - ford4 128.5.0.4
+ + + - - + - ford-lab 128.5.0.8
+ + - - - - - ford-vax 128.5.0.9
+ + - - - - - ford-res 128.5.0.10
+ + + - - + - ford-ecc 128.5.0.11
+ + + - - + - ford-srl 128.5.0.12
+ + + - - + - ford-ers 128.5.0.13
+ + + - - + - ford-eed 128.5.0.14 b
+ + + - - + - ford-foe 128.5.0.15 b
+ + + - - - + ford-wdl1 128.5.32.1
+ + - - - - - ford-wdl2 128.5.32.2
+ + + - - + - ford-wdl3 128.5.32.3
+ + - - - - - ford-wdl4 128.5.32.4
+ + + - - - + ford-wdl5 128.5.32.5
+ - + - - - + ford-wdl6 128.5.32.6
+ + - - - - - dfvlr1 128.7.0.1
+ + - - - - - dfvlr2 128.7.0.2
+ + - - - - - dfvlr3 128.7.0.3
+ + - - - - - dfvlr7 128.7.0.7
+ + + - - + - umd1 128.8.0.1
+ + + - - + - umd2 128.8.0.2
+ + + - - + - umd3 128.8.0.3
+ + + - - + - cvl 128.8.0.4
+ + + - - + - umd5 128.8.0.5
+ + - - - - - umd6 128.8.0.6
+ + - - - - - umd7 128.8.0.7
+ + + - - + - umd-csd 128.8.0.8
+ + - - - - - umd9 128.8.0.9
+ + - - - - - umda 128.8.0.10
+ + - - - - - umdb 128.8.0.11
+ + - - - - - umdc 128.8.0.12
+ + - - - - - umdd 128.8.0.13
+ + - - - - - umde 128.8.0.14
+ + - - - - - umdf 128.8.0.15
+ - - - - - - isi-accutest 128.9.0.24
+ - - - - - - isi-elvira 128.9.0.41
+
+Page 11
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ - - - - - - isi-hobgoblin 128.9.0.42
+ - - - - - - isi-moe 128.9.0.43
+ - - - - - - isi-troll 128.9.0.44
+ - - - - - - isi-curly 128.9.0.45
+ - - - - - - isi-shemp 128.9.0.46
+ - - - - - - isi-zombie 128.9.0.47
+ - - - - - - isi-xorn 128.9.0.48
+ - + - - - + isi-vlsia 128.9.0.49
+ - + + - - + isi-vlsib 128.9.0.50
+ - - - - - - isi-dawn 128.9.0.92
+ - - - - - - isi-rising 128.9.0.93
+ - - - - - - isi-spanky 128.9.0.112
+ - - - - - - isi-alfalfa 128.9.0.113
+ - - - - - - isi-darla 128.9.0.114
+ - - - - - - isi-buckwheat 128.9.0.115
+ - - - - - - isi-stymie 128.9.0.116
+ - - - - - - isi-farina 128.9.0.117
+ - - - - - - isi-pete 128.9.0.118
+ - - - - - - isi-froggie 128.9.0.119
+ - - - - - - isi-wab2 128.9.0.121
+ - - - - - - isi-randy 128.9.0.122
+ - - - - - - isi-rag2 128.9.0.123
+ + + - - + - csnet-purdue 128.10.0.2
+ + + - - - + bbn-cvax 128.11.0.2
+ + + - - - + bbnv1 128.11.64.1
+ - - - - - - ucl-lsih 128.16.1.67
+ - - - - - - ucl-lsil 128.16.1.106
+ - - - - - - ucl-lsim 128.16.1.110
+ - - - - - - ucl-lsii 128.16.1.112
+ - - - - - - ucl-lsij 128.16.1.113
+ - - - - - - ucl-lsik 128.16.1.115
+ - - - - - - ucl-terminal-gateway 128.16.3.2
+ - - - - - - ucl-sam 128.16.9.0
+ - - - - - - ucl-probe 128.16.9.1
+ - + - - + + ucl-tg 128.16.9.2
+ + - - - - - ucl-cs 128.16.9.3
+ - - - - - - ucl-niftp 128.16.9.4
+ + - - - - - edn-host1 128.19.1.1
+ + - - - - - brl-hep 128.20.1.2
+ + + - - + + amsaa 128.20.3.1
+ + + - - + + brl-voc 128.20.3.2
+ + + - - + + hel-ace 128.20.3.4
+ + + - + + + sri-spam 128.21.32.2
+ - + - - + - wisc-rsch 192.5.2.1
+ - + - - + - wisc-db 192.5.2.2
+ - + - - + - wisc-crys 192.5.2.7
+ + + - - - + cit-750 192.5.7.3
+ + + - - + - uw-beaver 192.5.8.1
+ + + - - + - uw-lumpy 192.5.8.2 b
+ + + - - + - uw-wally 192.5.8.3
+
+Page 12
+
+RFC 876
+
+Claim Arpa ISI- VRFY RCPT Bad
+SMTP net Net Post Post jqkx Host name Address Notes
+----- ---- ---- ---- ---- ---- --------- ------- -----
+ + + - - + - uw-june 192.5.8.4
+ + + - - + - uw-eddie 192.5.8.6
+ + + - + + + utah-gr 192.5.12.22
+ + + - + + + utah-sp 192.5.12.23
+ + - - - - - nyu-cmcl1 192.5.15.5
+ + - - - - - nyu-acf2 192.5.15.9
+ + + - - + + brl-bmd 192.5.21.1
+ + + - - + + brl-vld 192.5.21.2
+ - - - - - - brl-svg 192.5.21.3
+ + - - - - - brl-tgr 192.5.21.4
+ + + - - + + brl-vgr 192.5.21.6
+ + - - - - - cornell-pvax 192.5.36.4
+
+Notes
+-----
+ a) "VRFY postmaster" gave an unknown user reply; all other negative
+ replies were because VRFY was not implemented.
+
+ b) No connection could be opened to this host during the test of
+ mailing to nonexistent users
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
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+
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+
+
+
+
+Page 13
+