Report Description

This report is a comprehensive report involving all mail servers we know of visible on the internet. For each domain in our conventional web server survey, we also determine the list of mail servers that provide inbound mail services (via MX record lookups). Each unique mail server is connected to once each month, where we wait for the server's "220 " message which usually accompanies a banner revealing the server software being used.

Basic Response Statistics

When connecting to an MX server, a number of different responses are possible. The remote server may not be up and running or completely refusing connections, it may not respond back with a "220 " line in the amount of time we wait, nor will it always provide a banner that identifies the type of software running.

Description>	Number of Servers	Percent
Total Number of MX Servers Queried	2,295,233	100.0%
Number of Servers that didn't respond	365,159	15.91%
Server didn't open socket	353,475	15.40%
Server didn't provide banner	11,684	0.51%
Server provided banner	1,930,074	84.09%
Server banner identifies software in use	1,053,407	45.90%

As indicated by the above table, of the 2,295,233 servers queried, only 1,053,407 servers responded with a banner that allow us to identify the software being used. All of the remaining information in this report is based on the responses that allowed us to identify the software in use.

Basic Technology Breakdown

Server Type	Number of Servers	Percent
Exim	465,731	44.21%
Postfix	245,970	23.35%
Sendmail	128,986	12.24%
Microsoft	123,839	11.76%
MailEnable	33,199	3.15%
MDaemon	21,150	2.01%
IMail	9,311	0.88%
Lotus Domino	4,823	0.46%
WinWebMail	3,885	0.37%
CommuniGate Pro	3,355	0.32%
XMail	2,315	0.22%
Kerio	2,077	0.20%
Qmail Toaster	1,697	0.16%
Merak	1,581	0.15%
SurgeSMTP	1,226	0.12%
ArGoSoft	987	0.09%
GroupWise	744	0.07%
Trend Micro	454	0.04%
Gordano Messaging Suite (GMS)	402	0.04%
Post.Office	400	0.04%
MagicMail	350	0.03%
Mirapoint	226	0.02%
VisNetic	170	0.02%
InterScan VirusWall	160	0.02%
NetIQ MailMarshal	63	0.01%
Interscan	63	0.01%
Mercury	55	0.01%
Neon Mail Server	43	0.00%
WebSTAR V	42	0.00%
OpenVMS	22	0.00%
MessageWall	21	0.00%
OpenSMTPD	19	0.00%
ModusMail	16	0.00%
WebSTAR	15	0.00%
MAILsweeper	10	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (465,731 servers)
Version	Number of Servers	Percent
4.69	368,005	79.02%
4.76	36,227	7.78%
4.72	20,387	4.38%
4.77	10,824	2.32%
4.67	8,297	1.78%
4.63	5,689	1.22%
Other	16,302	3.50%
Postfix (245,970 servers)
Version	Number of Servers	Percent
Other	245,970	100.00%
Sendmail (128,986 servers)
Version	Number of Servers	Percent
8.13.8	32,172	24.94%
8.13.1	21,623	16.76%
8.14.3	17,552	13.61%
8.14.4	11,188	8.67%
8.14.5	9,837	7.63%
8.12.11.20060308	5,496	4.26%
8.13.6.20060614	4,412	3.42%
8.14.2	3,914	3.03%
8.11.6	2,936	2.28%
8.12.10	2,831	2.19%
8.13.6	2,529	1.96%
8.14.1	2,378	1.84%
8.12.11.20060614	2,021	1.57%
8.13.7	1,834	1.42%
8.12.11	1,656	1.28%
8.12.8	1,429	1.11%
8.13.4	1,368	1.06%
Other	3,810	2.95%
Microsoft (123,839 servers)
Version	Number of Servers	Percent
6.0.3790.4675	96,815	78.18%
6.0.3790.3959	16,773	13.54%
6.0.3790.1830	4,610	3.72%
5.0.2195.7381	1,465	1.18%
Other	4,176	3.37%
MailEnable (33,199 servers)
Version	Number of Servers	Percent
1.986--	9,252	27.87%
4.26--	2,649	7.98%
5.10--	2,028	6.11%
1.981--	1,813	5.46%
1.983--	1,141	3.44%
0-3.63-	806	2.43%
3.62--	787	2.37%
5.51--	785	2.36%
5.11--	683	2.06%
4.22--	488	1.47%
4.23--	444	1.34%
0-1.87-	428	1.29%
0-4.26-	413	1.24%
0-5.51-	407	1.23%
0-2.53-	360	1.08%
--3.63	333	1.00%
Other	10,382	31.27%
MDaemon (21,150 servers)
Version	Number of Servers	Percent
11.0.3	2,740	12.96%
12.5.2	2,626	12.42%
11.0.0	1,257	5.94%
12.0.3	1,050	4.96%
10.0.0	963	4.55%
10.1.2	957	4.52%
12.0.4	807	3.82%
12.5.1	777	3.67%
10.1.1	740	3.50%
9.6.1	575	2.72%
9.6.6	540	2.55%
12.5.0	518	2.45%
10.1.0	485	2.29%
12.0.1	360	1.70%
9.6.5	360	1.70%
9.5.2	351	1.66%
10.0.5	349	1.65%
9.6.2	331	1.57%
9.5.1	311	1.47%
10.0.2	303	1.43%
12.0.0	300	1.42%
9.5.6	288	1.36%
9.6.4	277	1.31%
8.1.3	264	1.25%
10.0.4	247	1.17%
9.0.4	242	1.14%
11.0.2	216	1.02%
Other	2,916	13.79%
IMail (9,311 servers)
Version	Number of Servers	Percent
8.22	1,665	17.88%
11.5	1,538	16.52%
8.15	613	6.58%
11.03	547	5.87%
9.23	541	5.81%
11.01	461	4.95%
8.05	370	3.97%
9.20	355	3.81%
11.02	352	3.78%
9.10	342	3.67%
10.02	281	3.02%
11.0	275	2.95%
7.07	229	2.46%
7.15	211	2.27%
8.00	181	1.94%
6.06	166	1.78%
10.01	138	1.48%
9.21	115	1.24%
Other	931	10.00%
Lotus Domino (4,823 servers)
Version	Number of Servers	Percent
8.5.3	534	11.07%
8.5.2	480	9.95%
8.5.2FP2	378	7.84%
8.5.1	310	6.43%
7.0.2	249	5.16%
8.5.2FP3	227	4.71%
8.5	204	4.23%
8.5.2FP1	188	3.90%
7.0.3	152	3.15%
8.0.1	117	2.43%
8.5.1FP5	111	2.30%
7.0.1	109	2.26%
8.0.2	106	2.20%
6.5.1	99	2.05%
6.5.4	99	2.05%
8.0	82	1.70%
6.5.3	81	1.68%
7.0	78	1.62%
8.5.1FP3	72	1.49%
7.0.3FP1	63	1.31%
6.5.5	62	1.29%
6.5	59	1.22%
8.5.1FP4	59	1.22%
7.0.2FP2	56	1.16%
Other	848	17.58%
WinWebMail (3,885 servers)
Version	Number of Servers	Percent
3.8.1.3	876	22.55%
3.8.0.1	632	16.27%
3.7.6.1	498	12.82%
3.8.1.1	337	8.67%
3.7.3.1	337	8.67%
3.7.7.3	306	7.88%
3.8.1.5	240	6.18%
3.7.1.1	168	4.32%
3.7.5.1	124	3.19%
3.7.7.1	90	2.32%
3.6.3.1	74	1.90%
3.7.0.5	65	1.67%
3.7.0.3	64	1.65%
3.7.0.7	52	1.34%
Other	22	0.57%
CommuniGate Pro (3,355 servers)
Version	Number of Servers	Percent
5.1.16	257	7.66%
5.4.2	188	5.60%
4.1.8	174	5.19%
5.4.1	156	4.65%
5.2.20	120	3.58%
5.3.13	119	3.55%
5.2.16	93	2.77%
4.2.10	87	2.59%
5.3.8	81	2.41%
5.4.3	75	2.24%
5.3.12	71	2.12%
5.4.0	70	2.09%
5.0.14	69	2.06%
5.1.12	68	2.03%
5.2.19	65	1.94%
5.2.3	65	1.94%
5.2.14	59	1.76%
5.3.10	55	1.64%
5.3.14	54	1.61%
5.1.13	51	1.52%
5.2.12	51	1.52%
5.3.9	48	1.43%
5.4	45	1.34%
5.2.8	43	1.28%
5.2.13	40	1.19%
5.3.11	38	1.13%
5.3.7	37	1.10%
5.1.14	35	1.04%
5.3.15	34	1.01%
Other	1,007	30.01%
XMail (2,315 servers)
Version	Number of Servers	Percent
1.22	535	23.11%
1.25	459	19.83%
1.27	454	19.61%
1.26	301	13.00%
1.24	218	9.42%
1.21	97	4.19%
1.23	54	2.33%
1.20	44	1.90%
1.17	37	1.60%
1.12	32	1.38%
Other	84	3.63%
Kerio (2,077 servers)
Version	Number of Servers	Percent
6.7.3	288	13.87%
6.6.2	222	10.69%
6.7.0	191	9.20%
6.5.0	145	6.98%
6.7.2	131	6.31%
6.5.2	130	6.26%
6.4.1	117	5.63%
6.7.1	113	5.44%
6.3.1	97	4.67%
6.4.0	82	3.95%
6.6.0	75	3.61%
6.5.1	74	3.56%
6.6.1	61	2.94%
6.4.2	49	2.36%
6.3.0	33	1.59%
6.2.0	25	1.20%
6.1.3	22	1.06%
6.2.2	21	1.01%
6.1.0	21	1.01%
6.0.10	21	1.01%
Other	159	7.66%
Qmail Toaster (1,697 servers)
Version	Number of Servers	Percent
1.3	1,602	94.40%
1.2	68	4.01%
1.0	18	1.06%
Other	9	0.53%
Merak (1,581 servers)
Version	Number of Servers	Percent
8.0.3	652	41.24%
8.9.1	162	10.25%
8.5.0	112	7.08%
7.6.4	72	4.55%
7.5.2	72	4.55%
8.3.8	65	4.11%
7.4.5	59	3.73%
9.0.0	30	1.90%
7.4.2	24	1.52%
7.2.0	22	1.39%
7.0.1	20	1.27%
8.2.4	20	1.27%
7.6.1	20	1.27%
8.9.0	19	1.20%
8.3.15	19	1.20%
6.2.1	18	1.14%
4.4.2	18	1.14%
Other	177	11.20%
SurgeSMTP (1,226 servers)
Version	Number of Servers	Percent
5.3h2-2	344	28.06%
5.2a-1	154	12.56%
3.9e-1	83	6.77%
4.2d4-4	81	6.61%
3.8k4-4	43	3.51%
5.3h-1	42	3.43%
4.0u4-4	40	3.26%
5.0e4-4	39	3.18%
3.8i3-3	23	1.88%
4.2d2-2	23	1.88%
4.3g2-2	22	1.79%
5.0e3-3	17	1.39%
3.6f5-5	16	1.31%
3.7b8-8	15	1.22%
3.9h-18	15	1.22%
4.3g4-4	15	1.22%
4.2a3-3	15	1.22%
4.3e-1	13	1.06%
3.9c-1	13	1.06%
5.1c2-2	13	1.06%
5.1c-1	13	1.06%
Other	187	15.25%
ArGoSoft (987 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	234	23.71%
1.8 (1.8.9.5)	156	15.81%
1.8 (1.8.9.3)	119	12.06%
1.8 (1.8.9.1)	85	8.61%
1.8 (1.8.8.8)	73	7.40%
1.8 (1.8.8.7)	51	5.17%
1.8 (1.8.9.2)	42	4.26%
1.8 (1.8.9.4)	27	2.74%
1.8 (1.8.6.0)	22	2.23%
1.8 (1.8.8.1)	16	1.62%
1.8 (1.8.8.9)	13	1.32%
1.8 (1.8.9.0)	13	1.32%
1.8 (1.8.8.2)	11	1.11%
Other	125	12.66%
GroupWise (744 servers)
Version	Number of Servers	Percent
7.0.3	156	20.97%
8.0.2	155	20.83%
6.5.7	83	11.16%
7.0.2	56	7.53%
7.0.4	48	6.45%
8.0.1	46	6.18%
7.0.1	30	4.03%
6.5.4	30	4.03%
6.5.6	22	2.96%
8.0.0	21	2.82%
6.5.1	21	2.82%
6.0.4	18	2.42%
6.5.5	14	1.88%
7.0	10	1.34%
Other	34	4.57%
Trend Micro (454 servers)
Version	Number of Servers	Percent
5.7	186	40.97%
5.5	112	24.67%
5.18	81	17.84%
7.0	45	9.91%
7.1	17	3.74%
Other	13	2.86%
Gordano Messaging Suite (GMS) (402 servers)
Version	Number of Servers	Percent
Other	402	100.00%
Post.Office (400 servers)
Version	Number of Servers	Percent
3.5.3	62	15.50%
4.1.0.2	39	9.75%
4.0.1	34	8.50%
4.1.2.4	22	5.50%
3.5.3J	20	5.00%
4.1.1	16	4.00%
3.9.2.3	15	3.75%
3.8.3	13	3.25%
3.9.2	11	2.75%
4.2	11	2.75%
3.1.2J	11	2.75%
3.1.2	9	2.25%
4.1.0.3	9	2.25%
4.0.1.1	8	2.00%
3.6.2	8	2.00%
4.1.0.4	8	2.00%
3.8.7.4	8	2.00%
4.1.2.3	7	1.75%
4.1.2.2	6	1.50%
3.9.2.1	6	1.50%
4.0.0.2	6	1.50%
4.1	5	1.25%
3.9.1.3	5	1.25%
3.5.2	5	1.25%
3.9.1	5	1.25%
4.2.1	5	1.25%
3.5.1	5	1.25%
3.9.2.2	4	1.00%
3.5.4	4	1.00%
3.9.1.2	4	1.00%
4.0.0.1	4	1.00%
Other	25	6.25%
MagicMail (350 servers)
Version	Number of Servers	Percent
Other	350	100.00%
Mirapoint (226 servers)
Version	Number of Servers	Percent
3.10.10a-GA	25	11.06%
4.2.3-GA	22	9.73%
3.8.4-GA	20	8.85%
3.10.5-GA	18	7.96%
3.8.3-GA	13	5.75%
4.1.10-GA	13	5.75%
3.10.9-GA	13	5.75%
3.10.8-GA	11	4.87%
4.1.3-GA	10	4.42%
4.1.9-GA	9	3.98%
3.10.7-GA	8	3.54%
4.1.8-GA	7	3.10%
4.1.4-GA	6	2.65%
3.8.5-GA	5	2.21%
3.10.4-GA	4	1.77%
3.8.2-GA	4	1.77%
3.8.7a	4	1.77%
4.2.4-GA	4	1.77%
3.10.3-GA	4	1.77%
4.3.3-GA	3	1.33%
4.1.5-GA	3	1.33%
Other	20	8.85%
VisNetic (170 servers)
Version	Number of Servers	Percent
9.3.2.0	52	30.59%
9.1.4.1	24	14.12%
5.8.6.6	10	5.88%
8.5.0.8	8	4.71%
5.5.8.3	8	4.71%
8.0.3.1	7	4.12%
7.6.1.0	6	3.53%
8.3.5.0	5	2.94%
8.0.3.0	5	2.94%
7.2.4.1	5	2.94%
8.0.3	5	2.94%
5.0.2.3	5	2.94%
5.3.5.0	4	2.35%
9.1.4.0	4	2.35%
6.2.2.0	3	1.76%
5.0.2.1	2	1.18%
5.4.5.4	2	1.18%
7-6-1-0	2	1.18%
Other	13	7.65%
InterScan VirusWall (160 servers)
Version	Number of Servers	Percent
Other	160	100.00%
NetIQ MailMarshal (63 servers)
Version	Number of Servers	Percent
6.0.3.8	43	68.25%
5.5.6.7	6	9.52%
6.1.3.15	5	7.94%
5.5.6.5	2	3.17%
5.5.6.6	2	3.17%
5.5.4.16	2	3.17%
5.5.5.9	1	1.59%
5.5.4.17	1	1.59%
5.5.5.6	1	1.59%
Other	0	0.00%
Interscan (63 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	11	17.46%
3.81-Build_1022	7	11.11%
3.55 (build 1029)	7	11.11%
3.8-Build_3013	6	9.52%
3.53 (build 2017)	5	7.94%
3.81-Build_1084	5	7.94%
3.55 (build 1020)	4	6.35%
3.53 (build 1493)	3	4.76%
3.53 (build 2011)	3	4.76%
3.52 (build 1375)	3	4.76%
3.53 (build 2013)	2	3.17%
3.81-Build_1055	1	1.59%
3.51 (build 1321)	1	1.59%
3.5 (build 1294)	1	1.59%
3.51 (build 1337)	1	1.59%
3.6-Build_1246	1	1.59%
3.8-Build_3045	1	1.59%
3.8-Build_1080	1	1.59%
Other	0	0.00%
Mercury (55 servers)
Version	Number of Servers	Percent
1.48	28	50.91%
3.32	15	27.27%
3.01a	2	3.64%
1.47	2	3.64%
3.21c	2	3.64%
3.30	2	3.64%
3.21	1	1.82%
1.44	1	1.82%
3.31	1	1.82%
4.x	1	1.82%
Other	0	0.00%
Neon Mail Server (43 servers)
Version	Number of Servers	Percent
3.1.3	11	25.58%
3.0.7	10	23.26%
3.0.9	6	13.95%
3.1.4	4	9.30%
3.1.0	4	9.30%
3.1.2	3	6.98%
3.1.1	2	4.65%
3.0.8	1	2.33%
3.1.5	1	2.33%
3.0.6	1	2.33%
Other	0	0.00%
WebSTAR V (42 servers)
Version	Number of Servers	Percent
5.4.1	20	47.62%
5.4.0	8	19.05%
5.3.4	6	14.29%
5.3.3	5	11.90%
5.3.2	2	4.76%
5.3.0	1	2.38%
Other	0	0.00%
OpenVMS (22 servers)
Version	Number of Servers	Percent
8.3	9	40.91%
7.3	7	31.82%
8.4	3	13.64%
6.1	1	4.55%
7.2	1	4.55%
8.2	1	4.55%
Other	0	0.00%
MessageWall (21 servers)
Version	Number of Servers	Percent
1.0.8	20	95.24%
1.0.6	1	4.76%
Other	0	0.00%
OpenSMTPD (19 servers)
Version	Number of Servers	Percent
Other	19	100.00%
ModusMail (16 servers)
Version	Number of Servers	Percent
4.35.477.0	7	43.75%
4.35.480.0	3	18.75%
4.1.361.21	1	6.25%
3.2.315.0	1	6.25%
4.0.340.3	1	6.25%
4.3.459.0	1	6.25%
4.35.477.8	1	6.25%
3.1.302.0	1	6.25%
Other	0	0.00%
WebSTAR (15 servers)
Version	Number of Servers	Percent
Other	15	100.00%
MAILsweeper (10 servers)
Version	Number of Servers	Percent
4.3.17.0	3	30.00%
4.3.20.0	2	20.00%
4.3.19.0	2	20.00%
4.3.14.0	1	10.00%
4.3.6.0	1	10.00%
4.3.1.0	1	10.00%
Other	0	0.00%