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	1,273,695	100.0%
Number of Servers that didn't respond	204,951	16.09%
Server didn't open socket	197,708	15.52%
Server didn't provide banner	7,243	0.57%
Server provided banner	1,068,744	83.91%
Server banner identifies software in use	583,506	45.81%

As indicated by the above table, of the 1,273,695 servers queried, only 583,506 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	221,222	37.91%
Postfix	128,910	22.09%
Microsoft	93,015	15.94%
Sendmail	84,386	14.46%
MailEnable	18,566	3.18%
MDaemon	12,966	2.22%
IMail	6,634	1.14%
Lotus Domino	3,051	0.52%
WinWebMail	2,650	0.45%
CommuniGate Pro	2,062	0.35%
Kerio	1,971	0.34%
XMail	1,497	0.26%
Merak	1,314	0.23%
Qmail Toaster	1,039	0.18%
ArGoSoft	756	0.13%
SurgeSMTP	737	0.13%
GroupWise	652	0.11%
Trend Micro	429	0.07%
Post.Office	308	0.05%
Gordano Messaging Suite (GMS)	271	0.05%
MagicMail	232	0.04%
Mirapoint	182	0.03%
InterScan VirusWall	169	0.03%
VisNetic	164	0.03%
NetIQ MailMarshal	73	0.01%
Interscan	55	0.01%
Mercury	52	0.01%
Neon Mail Server	39	0.01%
WebSTAR V	35	0.01%
OpenVMS	15	0.00%
WebSTAR	14	0.00%
ModusMail	14	0.00%
MessageWall	12	0.00%
MAILsweeper	7	0.00%
OpenSMTPD	7	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (221,222 servers)
Version	Number of Servers	Percent
4.69	188,035	85.00%
4.72	10,242	4.63%
4.67	7,517	3.40%
4.63	6,412	2.90%
4.71	2,796	1.26%
Other	6,220	2.81%
Postfix (128,910 servers)
Version	Number of Servers	Percent
Other	128,910	100.00%
Microsoft (93,015 servers)
Version	Number of Servers	Percent
6.0.3790.4675	64,730	69.59%
6.0.3790.3959	19,154	20.59%
6.0.3790.1830	4,800	5.16%
5.0.2195.7381	1,356	1.46%
5.0.2195.6713	1,025	1.10%
Other	1,950	2.10%
Sendmail (84,386 servers)
Version	Number of Servers	Percent
8.13.8	17,164	20.34%
8.13.1	15,963	18.92%
8.14.4	9,740	11.54%
8.14.3	8,635	10.23%
8.12.11.20060308	4,944	5.86%
8.12.11.20060614	4,851	5.75%
8.13.6.20060614	3,231	3.83%
8.14.2	2,579	3.06%
8.12.10	2,555	3.03%
8.11.6	2,347	2.78%
8.13.6	2,011	2.38%
8.14.1	1,845	2.19%
8.12.11	1,423	1.69%
8.13.7	1,375	1.63%
8.13.4	1,278	1.51%
8.12.8	1,171	1.39%
Other	3,274	3.88%
MailEnable (18,566 servers)
Version	Number of Servers	Percent
1.986--	6,242	33.62%
1.981--	1,578	8.50%
1.983--	931	5.01%
4.26--	682	3.67%
3.62--	642	3.46%
0-3.63-	514	2.77%
4.23--	496	2.67%
4.22--	436	2.35%
0-4.26-	383	2.06%
0-2.53-	285	1.54%
1.96--	282	1.52%
1.95--	266	1.43%
0-1.87-	240	1.29%
--3.63	238	1.28%
4.26--4.26	230	1.24%
4.14--	204	1.10%
0-4.23-	203	1.09%
0-3.61-	200	1.08%
1.9--	197	1.06%
Other	4,317	23.25%
MDaemon (12,966 servers)
Version	Number of Servers	Percent
11.0.3	3,692	28.47%
10.1.2	910	7.02%
10.0.0	683	5.27%
11.0.0	620	4.78%
10.1.1	592	4.57%
9.6.1	436	3.36%
9.6.6	421	3.25%
10.1.0	377	2.91%
9.5.2	303	2.34%
9.6.5	301	2.32%
10.0.5	292	2.25%
11.0.2	269	2.07%
10.0.2	269	2.07%
9.5.1	239	1.84%
9.5.6	232	1.79%
9.6.2	230	1.77%
10.0.4	216	1.67%
8.1.3	212	1.64%
9.6.4	208	1.60%
11.0.1	187	1.44%
9.0.4	179	1.38%
6.8.5	139	1.07%
9.6.3	138	1.06%
Other	1,821	14.04%
IMail (6,634 servers)
Version	Number of Servers	Percent
8.22	1,260	18.99%
11.02	635	9.57%
8.15	526	7.93%
9.23	453	6.83%
11.01	361	5.44%
9.10	351	5.29%
11.03	315	4.75%
8.05	294	4.43%
9.20	281	4.24%
10.02	241	3.63%
11.0	218	3.29%
9.21	208	3.14%
7.07	203	3.06%
7.15	140	2.11%
8.00	131	1.97%
6.06	129	1.94%
8.04	106	1.60%
10.01	94	1.42%
8.21	74	1.12%
10.0	71	1.07%
Other	543	8.19%
Lotus Domino (3,051 servers)
Version	Number of Servers	Percent
8.5.2	365	11.96%
8.5.1	287	9.41%
8.5	219	7.18%
7.0.2	200	6.56%
7.0.3	121	3.97%
7.0.1	112	3.67%
8.5.1FP3	104	3.41%
8.0.1	104	3.41%
8.0.2	96	3.15%
6.5.1	87	2.85%
6.5.4	77	2.52%
6.5.3	71	2.33%
8.5.1FP4	70	2.29%
6.5.5	67	2.20%
8.5.1FP2	66	2.16%
7.0	61	2.00%
8.0	56	1.84%
7.0.2FP2	55	1.80%
7.0.3FP1	52	1.70%
8.5.1FP1	50	1.64%
8.5.2FP1	43	1.41%
8.5.1FP5	42	1.38%
5.0.11	41	1.34%
6.5	40	1.31%
8.5FP1	37	1.21%
Other	528	17.31%
WinWebMail (2,650 servers)
Version	Number of Servers	Percent
3.8.0.1	594	22.42%
3.7.6.1	410	15.47%
3.7.7.3	310	11.70%
3.7.3.1	293	11.06%
3.8.1.1	284	10.72%
3.8.1.3	214	8.08%
3.7.1.1	141	5.32%
3.7.5.1	95	3.58%
3.6.3.1	71	2.68%
3.7.7.1	65	2.45%
3.7.0.3	57	2.15%
3.7.0.5	53	2.00%
3.7.0.7	45	1.70%
Other	18	0.68%
CommuniGate Pro (2,062 servers)
Version	Number of Servers	Percent
4.1.8	133	6.45%
5.1.16	129	6.26%
5.3.10	94	4.56%
5.3.8	88	4.27%
5.3.9	83	4.03%
5.3.11	81	3.93%
5.2.16	80	3.88%
4.2.10	69	3.35%
5.2.19	51	2.47%
5.2.3	47	2.28%
5.2.12	46	2.23%
5.2.20	44	2.13%
5.1.12	43	2.09%
5.1.13	42	2.04%
5.2.14	42	2.04%
5.3.7	39	1.89%
5.2.8	39	1.89%
5.2.13	33	1.60%
5.0.14	31	1.50%
5.2.18	31	1.50%
5.3.2	30	1.45%
5.3.5	30	1.45%
5.1.14	28	1.36%
5.2.10	27	1.31%
4.2.9	24	1.16%
4.2.8	23	1.12%
5.2.11	23	1.12%
5.0.9	22	1.07%
5.2.0	21	1.02%
5.2.6	21	1.02%
Other	568	27.55%
Kerio (1,971 servers)
Version	Number of Servers	Percent
6.7.3	282	14.31%
6.6.2	227	11.52%
6.7.0	180	9.13%
6.7.2	162	8.22%
6.5.0	133	6.75%
6.5.2	111	5.63%
6.3.1	106	5.38%
6.4.1	104	5.28%
6.7.1	93	4.72%
6.6.0	80	4.06%
6.4.0	77	3.91%
6.5.1	68	3.45%
6.4.2	46	2.33%
6.6.1	44	2.23%
6.3.0	43	2.18%
6.2.0	22	1.12%
6.1.3	20	1.01%
Other	173	8.78%
XMail (1,497 servers)
Version	Number of Servers	Percent
1.22	367	24.52%
1.25	334	22.31%
1.26	200	13.36%
1.24	197	13.16%
1.27	143	9.55%
1.21	69	4.61%
1.23	37	2.47%
1.20	35	2.34%
1.17	33	2.20%
1.12	26	1.74%
Other	56	3.74%
Merak (1,314 servers)
Version	Number of Servers	Percent
8.0.3	529	40.26%
8.9.1	137	10.43%
8.5.0	86	6.54%
8.3.8	60	4.57%
7.6.4	59	4.49%
7.4.5	58	4.41%
7.5.2	56	4.26%
8.2.13	27	2.05%
9.0.0	22	1.67%
8.2.4	21	1.60%
7.0.1	18	1.37%
7.6.1	18	1.37%
7.2.0	17	1.29%
6.2.1	16	1.22%
Other	190	14.46%
Qmail Toaster (1,039 servers)
Version	Number of Servers	Percent
1.3	962	92.59%
1.2	61	5.87%
Other	16	1.54%
ArGoSoft (756 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	161	21.30%
1.8 (1.8.9.5)	111	14.68%
1.8 (1.8.9.3)	97	12.83%
1.8 (1.8.9.1)	78	10.32%
1.8 (1.8.8.8)	62	8.20%
1.8 (1.8.8.7)	43	5.69%
1.8 (1.8.9.2)	32	4.23%
1.8 (1.8.9.4)	26	3.44%
1.8 (1.8.8.9)	16	2.12%
1.8 (1.8.9.0)	13	1.72%
1.8 (1.8.8.1)	11	1.46%
1.8 (1.8.6.0)	10	1.32%
Other	96	12.70%
SurgeSMTP (737 servers)
Version	Number of Servers	Percent
5.0e4-4	128	17.37%
3.9e-1	83	11.26%
4.2d4-4	52	7.06%
5.1c2-2	34	4.61%
4.0u4-4	33	4.48%
4.3g2-2	31	4.21%
3.8k4-4	30	4.07%
5.0e3-3	30	4.07%
5.1c-1	24	3.26%
4.2d2-2	23	3.12%
4.3e-1	22	2.99%
4.3g4-4	22	2.99%
3.8i3-3	20	2.71%
4.2a3-3	14	1.90%
3.8f3-3	13	1.76%
3.6f5-5	12	1.63%
3.9h-18	12	1.63%
3.8f2-2	11	1.49%
3.9g2-2	11	1.49%
3.9c-1	11	1.49%
3.7b8-8	10	1.36%
5.2a-1	9	1.22%
Other	102	13.84%
GroupWise (652 servers)
Version	Number of Servers	Percent
7.0.3	150	23.01%
6.5.7	85	13.04%
8.0.2	71	10.89%
7.0.2	64	9.82%
8.0.1	47	7.21%
7.0.1	34	5.21%
6.5.4	33	5.06%
7.0.4	30	4.60%
6.5.6	28	4.29%
6.5.1	24	3.68%
6.0.4	23	3.53%
8.0.0	18	2.76%
7.0	11	1.69%
6.5.5	10	1.53%
Other	24	3.68%
Trend Micro (429 servers)
Version	Number of Servers	Percent
5.7	193	44.99%
5.5	112	26.11%
5.18	76	17.72%
7.0	32	7.46%
7.1	10	2.33%
Other	6	1.40%
Post.Office (308 servers)
Version	Number of Servers	Percent
3.5.3	51	16.56%
4.1.0.2	32	10.39%
4.0.1	23	7.47%
3.5.3J	18	5.84%
4.1.1	17	5.52%
4.1.0.4	14	4.55%
3.8.3	11	3.57%
3.9.2.3	10	3.25%
3.9.2	10	3.25%
3.1.2J	10	3.25%
4.1.0.3	8	2.60%
4.0.1.1	7	2.27%
3.9.1	7	2.27%
4.1	6	1.95%
3.9.1.2	5	1.62%
3.6.3	5	1.62%
4.0.0.1	5	1.62%
3.6.2	5	1.62%
3.8.7.4	5	1.62%
3.9.2.1	5	1.62%
4.0.0.2	5	1.62%
3.9.2.2	4	1.30%
3.1.2	4	1.30%
4.1.2	4	1.30%
4.1.2.3	4	1.30%
4.1.2.2	4	1.30%
Other	29	9.42%
Gordano Messaging Suite (GMS) (271 servers)
Version	Number of Servers	Percent
Other	271	100.00%
MagicMail (232 servers)
Version	Number of Servers	Percent
Other	232	100.00%
Mirapoint (182 servers)
Version	Number of Servers	Percent
3.10.8-GA	21	11.54%
3.8.4-GA	20	10.99%
3.10.7-GA	15	8.24%
3.8.3-GA	15	8.24%
3.10.5-GA	14	7.69%
3.10.9-GA	14	7.69%
4.1.3-GA	9	4.95%
4.1.9-GA	9	4.95%
3.10.10a-GA	7	3.85%
3.10.4-GA	6	3.30%
3.10.3-GA	6	3.30%
4.1.10-GA	6	3.30%
3.7.5a-GA	5	2.75%
3.8.5-GA	4	2.20%
4.2.3-GA	4	2.20%
3.10.6-GA	4	2.20%
4.1.4-GA	3	1.65%
4.1.8-GA	3	1.65%
4.0.5a	2	1.10%
3.8.2-GA	2	1.10%
4.1.7a-GA	2	1.10%
3.8.6-GA	2	1.10%
Other	9	4.95%
InterScan VirusWall (169 servers)
Version	Number of Servers	Percent
Other	169	100.00%
VisNetic (164 servers)
Version	Number of Servers	Percent
9.3.2.0	61	37.20%
9.1.4.1	22	13.41%
5.8.6.6	9	5.49%
8.5.0.8	9	5.49%
5.5.8.3	7	4.27%
8.0.3.1	6	3.66%
8.0.3.0	5	3.05%
6.2.2.0	4	2.44%
5.3.5.0	4	2.44%
7.6.1.0	4	2.44%
8.3.5.0	3	1.83%
9.1.4.0	3	1.83%
8.0.3	3	1.83%
5.0.2.3	3	1.83%
5.4.5.4	3	1.83%
8.3.6	2	1.22%
8.3.0.1	2	1.22%
8.5.0.5	2	1.22%
5.0.2.1	2	1.22%
7-6-1-0	2	1.22%
Other	8	4.88%
NetIQ MailMarshal (73 servers)
Version	Number of Servers	Percent
6.0.3.8	51	69.86%
6.1.3.15	6	8.22%
5.5.6.7	4	5.48%
5.5.6.6	3	4.11%
5.5.4.16	3	4.11%
5.5.5.9	1	1.37%
6.5.4.7535	1	1.37%
5.5.3.17	1	1.37%
5.5.3.15	1	1.37%
5.5.5.8	1	1.37%
5.5.4.17	1	1.37%
Other	0	0.00%
Interscan (55 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	11	20.00%
3.55 (build 1029)	7	12.73%
3.81-Build_1022	6	10.91%
3.53 (build 2017)	6	10.91%
3.55 (build 1020)	4	7.27%
3.8-Build_3013	3	5.45%
3.53 (build 1494)	2	3.64%
3.53 (build 1493)	2	3.64%
3.53 (build 2011)	2	3.64%
3.53 (build 2013)	2	3.64%
3.81-Build_1084	2	3.64%
3.81-Build_1055	1	1.82%
3.51 (build 1321)	1	1.82%
3.8-Build_3065	1	1.82%
3.6-Build_3013	1	1.82%
3.8-Build_1080	1	1.82%
3.6-Build_1273	1	1.82%
3.6-Build_1246	1	1.82%
3.81-Build_1032	1	1.82%
Other	0	0.00%
Mercury (52 servers)
Version	Number of Servers	Percent
1.48	26	50.00%
3.32	17	32.69%
3.21c	3	5.77%
1.47	2	3.85%
3.21	1	1.92%
1.44	1	1.92%
3.01a	1	1.92%
3.31	1	1.92%
Other	0	0.00%
Neon Mail Server (39 servers)
Version	Number of Servers	Percent
3.0.7	10	25.64%
3.1.3	9	23.08%
3.0.9	5	12.82%
3.1.4	4	10.26%
3.1.0	4	10.26%
3.1.2	3	7.69%
3.1.5	2	5.13%
3.0.8	1	2.56%
3.1.1	1	2.56%
Other	0	0.00%
WebSTAR V (35 servers)
Version	Number of Servers	Percent
5.4.1	12	34.29%
5.3.4	8	22.86%
5.4.0	8	22.86%
5.3.3	3	8.57%
5.3.2	3	8.57%
5.3.0	1	2.86%
Other	0	0.00%
OpenVMS (15 servers)
Version	Number of Servers	Percent
8.3	7	46.67%
7.3	6	40.00%
6.1	1	6.67%
8.2	1	6.67%
Other	0	0.00%
WebSTAR (14 servers)
Version	Number of Servers	Percent
Other	14	100.00%
ModusMail (14 servers)
Version	Number of Servers	Percent
4.2.420.0	5	35.71%
4.1.361.21	2	14.29%
4.35.477.0	2	14.29%
4.35.480.0	1	7.14%
4.2.425.22	1	7.14%
3.2.315.0	1	7.14%
4.0.340.3	1	7.14%
3.1.293.1	1	7.14%
Other	0	0.00%
MessageWall (12 servers)
Version	Number of Servers	Percent
1.0.8	11	91.67%
1.0.6	1	8.33%
Other	0	0.00%
MAILsweeper (7 servers)
Version	Number of Servers	Percent
4.3.17.0	4	57.14%
4.3.20.0	1	14.29%
4.3.19.0	1	14.29%
4.3.10.0	1	14.29%
Other	0	0.00%
OpenSMTPD (7 servers)
Version	Number of Servers	Percent
Other	7	100.00%