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	2,329,809	100.0%
Number of Servers that didn't respond	383,454	16.46%
Server didn't open socket	371,362	15.94%
Server didn't provide banner	12,092	0.52%
Server provided banner	1,946,355	83.54%
Server banner identifies software in use	1,060,983	45.54%

As indicated by the above table, of the 2,329,809 servers queried, only 1,060,983 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	454,804	42.87%
Postfix	248,375	23.41%
Sendmail	133,155	12.55%
Microsoft	133,018	12.54%
MailEnable	33,297	3.14%
MDaemon	21,909	2.06%
IMail	9,679	0.91%
Lotus Domino	5,054	0.48%
WinWebMail	4,144	0.39%
CommuniGate Pro	3,492	0.33%
XMail	2,423	0.23%
Kerio	2,279	0.21%
Qmail Toaster	1,718	0.16%
Merak	1,713	0.16%
SurgeSMTP	1,269	0.12%
ArGoSoft	1,047	0.10%
GroupWise	830	0.08%
Trend Micro	506	0.05%
Post.Office	456	0.04%
Gordano Messaging Suite (GMS)	436	0.04%
MagicMail	364	0.03%
Mirapoint	247	0.02%
VisNetic	192	0.02%
InterScan VirusWall	179	0.02%
NetIQ MailMarshal	76	0.01%
Interscan	72	0.01%
Mercury	58	0.01%
Neon Mail Server	46	0.00%
WebSTAR V	40	0.00%
OpenVMS	23	0.00%
MessageWall	22	0.00%
WebSTAR	17	0.00%
ModusMail	17	0.00%
OpenSMTPD	16	0.00%
MAILsweeper	10	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (454,804 servers)
Version	Number of Servers	Percent
4.69	360,106	79.18%
4.76	35,799	7.87%
4.72	20,680	4.55%
4.67	9,013	1.98%
4.77	6,600	1.45%
4.63	5,865	1.29%
Other	16,741	3.68%
Postfix (248,375 servers)
Version	Number of Servers	Percent
Other	248,375	100.00%
Sendmail (133,155 servers)
Version	Number of Servers	Percent
8.13.8	32,045	24.07%
8.13.1	22,968	17.25%
8.14.4	18,722	14.06%
8.14.3	17,952	13.48%
8.12.11.20060308	5,902	4.43%
8.13.6.20060614	4,576	3.44%
8.14.2	4,205	3.16%
8.11.6	3,192	2.40%
8.12.10	3,074	2.31%
8.13.6	2,717	2.04%
8.14.1	2,613	1.96%
8.12.11.20060614	2,223	1.67%
8.14.5	2,032	1.53%
8.13.7	1,957	1.47%
8.12.11	1,811	1.36%
8.12.8	1,538	1.16%
8.13.4	1,471	1.10%
Other	4,157	3.12%
Microsoft (133,018 servers)
Version	Number of Servers	Percent
6.0.3790.4675	103,019	77.45%
6.0.3790.3959	18,748	14.09%
6.0.3790.1830	5,215	3.92%
5.0.2195.7381	1,656	1.24%
Other	4,380	3.29%
MailEnable (33,297 servers)
Version	Number of Servers	Percent
1.986--	9,661	29.01%
4.26--	2,654	7.97%
1.981--	1,946	5.84%
5.10--	1,491	4.48%
1.983--	1,234	3.71%
0-3.63-	844	2.53%
3.62--	824	2.47%
5.51--	804	2.41%
5.11--	737	2.21%
4.22--	520	1.56%
0-5.51-	517	1.55%
0-4.26-	515	1.55%
4.23--	464	1.39%
0-1.87-	419	1.26%
0-2.53-	378	1.14%
--3.63	353	1.06%
1.95--	352	1.06%
1.96--	351	1.05%
Other	9,233	27.73%
MDaemon (21,909 servers)
Version	Number of Servers	Percent
11.0.3	2,958	13.50%
12.5.0	2,179	9.95%
12.0.4	1,566	7.15%
12.0.3	1,427	6.51%
11.0.0	1,247	5.69%
10.1.2	1,039	4.74%
10.0.0	1,006	4.59%
10.1.1	782	3.57%
9.6.1	609	2.78%
9.6.6	573	2.62%
10.1.0	524	2.39%
12.0.1	442	2.02%
9.5.2	394	1.80%
9.6.5	378	1.73%
10.0.5	373	1.70%
10.0.2	352	1.61%
12.0.0	348	1.59%
9.6.2	346	1.58%
9.5.1	337	1.54%
9.5.6	316	1.44%
9.6.4	297	1.36%
8.1.3	283	1.29%
10.0.4	276	1.26%
9.0.4	266	1.21%
12.0.2	239	1.09%
11.0.2	225	1.03%
Other	3,127	14.27%
IMail (9,679 servers)
Version	Number of Servers	Percent
8.22	1,805	18.65%
11.5	1,436	14.84%
8.15	661	6.83%
11.03	584	6.03%
9.23	564	5.83%
11.01	472	4.88%
8.05	398	4.11%
11.02	372	3.84%
9.20	346	3.57%
9.10	328	3.39%
10.02	299	3.09%
11.0	294	3.04%
7.07	254	2.62%
7.15	221	2.28%
8.00	188	1.94%
6.06	175	1.81%
10.01	147	1.52%
9.21	121	1.25%
8.04	108	1.12%
Other	906	9.36%
Lotus Domino (5,054 servers)
Version	Number of Servers	Percent
8.5.2	553	10.94%
8.5.2FP2	446	8.82%
8.5.1	340	6.73%
8.5.3	273	5.40%
8.5.2FP3	271	5.36%
7.0.2	268	5.30%
8.5	233	4.61%
8.5.2FP1	215	4.25%
7.0.3	152	3.01%
8.0.1	123	2.43%
8.5.1FP5	122	2.41%
8.0.2	122	2.41%
7.0.1	120	2.37%
6.5.4	109	2.16%
6.5.1	104	2.06%
8.5.1FP3	90	1.78%
8.0	90	1.78%
6.5.3	89	1.76%
7.0	83	1.64%
6.5.5	73	1.44%
7.0.2FP2	72	1.42%
7.0.3FP1	68	1.35%
6.5	66	1.31%
8.5.1FP4	63	1.25%
8.5.1FP2	55	1.09%
Other	854	16.90%
WinWebMail (4,144 servers)
Version	Number of Servers	Percent
3.8.1.3	1,008	24.32%
3.8.0.1	703	16.96%
3.7.6.1	560	13.51%
3.7.7.3	359	8.66%
3.8.1.1	356	8.59%
3.7.3.1	354	8.54%
3.7.1.1	178	4.30%
3.7.5.1	127	3.06%
3.7.7.1	106	2.56%
3.6.3.1	87	2.10%
3.7.0.5	76	1.83%
3.8.1.5	75	1.81%
3.7.0.3	72	1.74%
3.7.0.7	57	1.38%
Other	26	0.63%
CommuniGate Pro (3,492 servers)
Version	Number of Servers	Percent
5.1.16	271	7.76%
5.4.1	197	5.64%
4.1.8	179	5.13%
5.3.13	142	4.07%
5.2.20	118	3.38%
5.4.2	116	3.32%
5.4.0	93	2.66%
5.2.16	93	2.66%
4.2.10	92	2.63%
5.3.8	90	2.58%
5.3.12	75	2.15%
5.2.19	74	2.12%
5.2.3	72	2.06%
5.1.12	72	2.06%
5.0.14	71	2.03%
5.2.14	67	1.92%
5.3.14	66	1.89%
5.3.10	63	1.80%
5.4	60	1.72%
5.3.9	57	1.63%
5.1.13	53	1.52%
5.2.12	51	1.46%
5.2.8	49	1.40%
5.3.11	46	1.32%
5.2.13	43	1.23%
5.3.7	38	1.09%
5.2.0	37	1.06%
5.3.2	37	1.06%
5.1.14	35	1.00%
Other	1,035	29.64%
XMail (2,423 servers)
Version	Number of Servers	Percent
1.22	582	24.02%
1.25	483	19.93%
1.27	421	17.38%
1.26	310	12.79%
1.24	249	10.28%
1.21	104	4.29%
1.23	59	2.43%
1.20	55	2.27%
1.17	39	1.61%
1.12	34	1.40%
Other	87	3.59%
Kerio (2,279 servers)
Version	Number of Servers	Percent
6.7.3	329	14.44%
6.6.2	240	10.53%
6.7.0	202	8.86%
6.5.0	156	6.85%
6.7.2	154	6.76%
6.5.2	147	6.45%
6.4.1	120	5.27%
6.7.1	117	5.13%
6.3.1	109	4.78%
6.4.0	90	3.95%
6.6.0	84	3.69%
6.5.1	76	3.33%
6.6.1	70	3.07%
6.4.2	55	2.41%
6.3.0	38	1.67%
6.1.3	26	1.14%
6.2.2	26	1.14%
6.2.0	24	1.05%
6.1.0	23	1.01%
Other	193	8.47%
Qmail Toaster (1,718 servers)
Version	Number of Servers	Percent
1.3	1,616	94.06%
1.2	71	4.13%
1.0	19	1.11%
Other	12	0.70%
Merak (1,713 servers)
Version	Number of Servers	Percent
8.0.3	709	41.39%
8.9.1	174	10.16%
8.5.0	128	7.47%
7.5.2	75	4.38%
7.6.4	72	4.20%
8.3.8	71	4.14%
7.4.5	61	3.56%
9.0.0	29	1.69%
7.4.2	27	1.58%
7.2.0	23	1.34%
8.3.15	23	1.34%
8.2.4	22	1.28%
7.6.1	22	1.28%
7.0.1	21	1.23%
8.9.0	20	1.17%
6.2.1	19	1.11%
Other	217	12.67%
SurgeSMTP (1,269 servers)
Version	Number of Servers	Percent
5.3h2-2	317	24.98%
5.2a-1	188	14.81%
3.9e-1	94	7.41%
4.2d4-4	87	6.86%
5.0e4-4	46	3.62%
4.0u4-4	45	3.55%
3.8k4-4	43	3.39%
5.3h-1	43	3.39%
3.8i3-3	27	2.13%
4.2d2-2	25	1.97%
4.3g2-2	23	1.81%
5.0e3-3	17	1.34%
4.3e-1	16	1.26%
3.6f5-5	16	1.26%
3.9h-18	15	1.18%
3.9c-1	15	1.18%
5.1c2-2	15	1.18%
4.2a3-3	15	1.18%
3.7b8-8	14	1.10%
4.3g4-4	14	1.10%
Other	194	15.29%
ArGoSoft (1,047 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	239	22.83%
1.8 (1.8.9.5)	172	16.43%
1.8 (1.8.9.3)	132	12.61%
1.8 (1.8.9.1)	99	9.46%
1.8 (1.8.8.8)	75	7.16%
1.8 (1.8.8.7)	58	5.54%
1.8 (1.8.9.2)	43	4.11%
1.8 (1.8.9.4)	27	2.58%
1.8 (1.8.6.0)	18	1.72%
1.8 (1.8.8.1)	16	1.53%
1.8 (1.8.8.9)	15	1.43%
1.8 (1.8.9.0)	15	1.43%
1.8 (1.8.8.2)	11	1.05%
Other	127	12.13%
GroupWise (830 servers)
Version	Number of Servers	Percent
7.0.3	183	22.05%
8.0.2	165	19.88%
6.5.7	93	11.20%
7.0.2	63	7.59%
7.0.4	56	6.75%
8.0.1	54	6.51%
6.5.4	32	3.86%
7.0.1	30	3.61%
6.5.6	26	3.13%
6.0.4	25	3.01%
6.5.1	20	2.41%
8.0.0	19	2.29%
6.5.5	16	1.93%
7.0	13	1.57%
Other	35	4.22%
Trend Micro (506 servers)
Version	Number of Servers	Percent
5.7	210	41.50%
5.5	126	24.90%
5.18	89	17.59%
7.0	50	9.88%
7.1	17	3.36%
Other	14	2.77%
Post.Office (456 servers)
Version	Number of Servers	Percent
3.5.3	75	16.45%
4.1.0.2	51	11.18%
4.0.1	37	8.11%
4.1.2.4	30	6.58%
4.1.1	22	4.82%
3.5.3J	21	4.61%
3.9.2.3	18	3.95%
3.8.3	14	3.07%
3.9.2	13	2.85%
3.1.2J	11	2.41%
3.1.2	10	2.19%
4.1.0.3	10	2.19%
4.2	10	2.19%
4.0.1.1	9	1.97%
3.6.2	9	1.97%
4.1.0.4	9	1.97%
4.1.2.3	8	1.75%
3.8.7.4	8	1.75%
4.1.2.2	7	1.54%
3.9.2.1	7	1.54%
4.0.0.2	7	1.54%
4.1	6	1.32%
4.0.0.1	6	1.32%
3.9.1	6	1.32%
3.9.1.2	5	1.10%
3.9.1.3	5	1.10%
3.5.1	5	1.10%
Other	37	8.11%
Gordano Messaging Suite (GMS) (436 servers)
Version	Number of Servers	Percent
Other	436	100.00%
MagicMail (364 servers)
Version	Number of Servers	Percent
Other	364	100.00%
Mirapoint (247 servers)
Version	Number of Servers	Percent
4.2.3-GA	28	11.34%
3.10.10a-GA	24	9.72%
3.8.4-GA	22	8.91%
3.10.5-GA	18	7.29%
3.8.3-GA	17	6.88%
4.1.10-GA	14	5.67%
3.10.8-GA	13	5.26%
3.10.9-GA	13	5.26%
4.1.3-GA	11	4.45%
3.10.3-GA	10	4.05%
3.10.7-GA	9	3.64%
4.1.9-GA	9	3.64%
3.8.2-GA	6	2.43%
4.1.4-GA	6	2.43%
3.8.7a	6	2.43%
4.1.8-GA	6	2.43%
3.8.5-GA	5	2.02%
3.7.5a-GA	3	1.21%
3.8.6-GA	3	1.21%
4.2.4-GA	3	1.21%
4.1.5-GA	3	1.21%
Other	18	7.29%
VisNetic (192 servers)
Version	Number of Servers	Percent
9.3.2.0	58	30.21%
9.1.4.1	27	14.06%
5.8.6.6	13	6.77%
8.5.0.8	10	5.21%
5.5.8.3	9	4.69%
8.0.3.1	7	3.65%
8.0.3	6	3.12%
5.0.2.3	6	3.12%
7.6.1.0	6	3.12%
8.3.5.0	5	2.60%
8.0.3.0	5	2.60%
5.0.2.1	4	2.08%
7.2.4.1	4	2.08%
5.3.5.0	4	2.08%
9.1.4.0	4	2.08%
6.2.2.0	3	1.56%
8.3.0.1	2	1.04%
5.4.5.4	2	1.04%
7-6-1-0	2	1.04%
7.5.3.0	2	1.04%
Other	13	6.77%
InterScan VirusWall (179 servers)
Version	Number of Servers	Percent
Other	179	100.00%
NetIQ MailMarshal (76 servers)
Version	Number of Servers	Percent
6.0.3.8	52	68.42%
5.5.6.7	7	9.21%
6.1.3.15	6	7.89%
5.5.4.16	3	3.95%
5.5.6.5	2	2.63%
5.5.6.6	2	2.63%
5.5.5.9	1	1.32%
5.5.4.17	1	1.32%
5.5.3.17	1	1.32%
5.5.5.6	1	1.32%
Other	0	0.00%
Interscan (72 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	16	22.22%
3.55 (build 1029)	9	12.50%
3.81-Build_1022	8	11.11%
3.81-Build_1084	6	8.33%
3.53 (build 2017)	5	6.94%
3.8-Build_3013	5	6.94%
3.53 (build 1493)	4	5.56%
3.55 (build 1020)	4	5.56%
3.53 (build 2011)	3	4.17%
3.53 (build 2013)	2	2.78%
3.8-Build_1080	2	2.78%
3.52 (build 1375)	2	2.78%
3.81-Build_1055	1	1.39%
3.51 (build 1321)	1	1.39%
3.5 (build 1294)	1	1.39%
3.51 (build 1337)	1	1.39%
3.6-Build_1246	1	1.39%
3.8-Build_3045	1	1.39%
Other	0	0.00%
Mercury (58 servers)
Version	Number of Servers	Percent
1.48	29	50.00%
3.32	16	27.59%
3.21c	3	5.17%
3.21	2	3.45%
3.01a	2	3.45%
1.47	2	3.45%
1.44	1	1.72%
3.31	1	1.72%
4.x	1	1.72%
3.30	1	1.72%
Other	0	0.00%
Neon Mail Server (46 servers)
Version	Number of Servers	Percent
3.1.3	13	28.26%
3.0.7	10	21.74%
3.0.9	6	13.04%
3.1.4	5	10.87%
3.1.0	5	10.87%
3.1.2	3	6.52%
3.0.6	2	4.35%
3.1.1	1	2.17%
3.1.5	1	2.17%
Other	0	0.00%
WebSTAR V (40 servers)
Version	Number of Servers	Percent
5.4.1	19	47.50%
5.4.0	7	17.50%
5.3.4	6	15.00%
5.3.3	5	12.50%
5.3.2	2	5.00%
5.3.0	1	2.50%
Other	0	0.00%
OpenVMS (23 servers)
Version	Number of Servers	Percent
8.3	10	43.48%
7.3	7	30.43%
8.4	4	17.39%
6.1	1	4.35%
8.2	1	4.35%
Other	0	0.00%
MessageWall (22 servers)
Version	Number of Servers	Percent
1.0.8	21	95.45%
1.0.6	1	4.55%
Other	0	0.00%
WebSTAR (17 servers)
Version	Number of Servers	Percent
Other	17	100.00%
ModusMail (17 servers)
Version	Number of Servers	Percent
4.35.477.0	8	47.06%
4.35.480.0	3	17.65%
4.1.361.21	1	5.88%
3.2.315.0	1	5.88%
4.0.340.3	1	5.88%
4.3.459.0	1	5.88%
4.35.477.8	1	5.88%
3.1.302.0	1	5.88%
Other	0	0.00%
OpenSMTPD (16 servers)
Version	Number of Servers	Percent
Other	16	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%
4.3.1.0	1	10.00%
4.3.14.0	1	10.00%
4.3.6.0	1	10.00%
Other	0	0.00%