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	2,338,068	100.0%
Number of Servers that didn't respond	392,741	16.80%
Server didn't open socket	380,426	16.27%
Server didn't provide banner	12,315	0.53%
Server provided banner	1,945,327	83.20%
Server banner identifies software in use	1,060,186	45.34%

As indicated by the above table, of the 2,338,068 servers queried, only 1,060,186 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	459,089	43.30%
Postfix	250,173	23.60%
Sendmail	131,739	12.43%
Microsoft	128,466	12.12%
MailEnable	33,227	3.13%
MDaemon	21,680	2.04%
IMail	9,597	0.91%
Lotus Domino	5,008	0.47%
WinWebMail	4,076	0.38%
CommuniGate Pro	3,418	0.32%
XMail	2,408	0.23%
Kerio	2,185	0.21%
Qmail Toaster	1,715	0.16%
Merak	1,644	0.16%
SurgeSMTP	1,265	0.12%
ArGoSoft	1,031	0.10%
GroupWise	791	0.07%
Trend Micro	475	0.04%
Post.Office	448	0.04%
Gordano Messaging Suite (GMS)	417	0.04%
MagicMail	357	0.03%
Mirapoint	240	0.02%
InterScan VirusWall	179	0.02%
VisNetic	178	0.02%
NetIQ MailMarshal	71	0.01%
Interscan	67	0.01%
Mercury	54	0.01%
WebSTAR V	43	0.00%
Neon Mail Server	41	0.00%
OpenVMS	23	0.00%
MessageWall	20	0.00%
OpenSMTPD	18	0.00%
WebSTAR	17	0.00%
ModusMail	17	0.00%
MAILsweeper	9	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (459,089 servers)
Version	Number of Servers	Percent
4.69	362,481	78.96%
4.76	35,282	7.69%
4.72	20,769	4.52%
4.77	9,662	2.10%
4.67	8,553	1.86%
4.63	5,800	1.26%
Other	16,542	3.60%
Postfix (250,173 servers)
Version	Number of Servers	Percent
Other	250,173	100.00%
Sendmail (131,739 servers)
Version	Number of Servers	Percent
8.13.8	32,447	24.63%
8.13.1	22,184	16.84%
8.14.3	17,792	13.51%
8.14.4	11,642	8.84%
8.14.5	9,346	7.09%
8.12.11.20060308	5,756	4.37%
8.13.6.20060614	4,484	3.40%
8.14.2	4,090	3.10%
8.11.6	3,094	2.35%
8.12.10	2,957	2.24%
8.13.6	2,639	2.00%
8.14.1	2,530	1.92%
8.12.11.20060614	2,169	1.65%
8.13.7	1,885	1.43%
8.12.11	1,760	1.34%
8.12.8	1,513	1.15%
8.13.4	1,429	1.08%
Other	4,022	3.05%
Microsoft (128,466 servers)
Version	Number of Servers	Percent
6.0.3790.4675	100,061	77.89%
6.0.3790.3959	17,665	13.75%
6.0.3790.1830	4,897	3.81%
5.0.2195.7381	1,570	1.22%
Other	4,273	3.33%
MailEnable (33,227 servers)
Version	Number of Servers	Percent
1.986--	9,440	28.41%
4.26--	2,605	7.84%
1.981--	1,886	5.68%
5.10--	1,742	5.24%
1.983--	1,186	3.57%
0-3.63-	826	2.49%
3.62--	802	2.41%
5.51--	800	2.41%
5.11--	716	2.15%
4.22--	496	1.49%
0-4.26-	473	1.42%
0-5.51-	452	1.36%
4.23--	448	1.35%
0-1.87-	425	1.28%
0-2.53-	378	1.14%
--3.63	343	1.03%
Other	10,209	30.73%
MDaemon (21,680 servers)
Version	Number of Servers	Percent
11.0.3	2,855	13.17%
12.5.2	1,703	7.86%
12.5.1	1,264	5.83%
11.0.0	1,240	5.72%
12.0.3	1,185	5.47%
10.0.0	999	4.61%
10.1.2	994	4.58%
12.0.4	943	4.35%
10.1.1	775	3.57%
12.5.0	643	2.97%
9.6.1	597	2.75%
9.6.6	555	2.56%
10.1.0	506	2.33%
12.0.1	392	1.81%
9.6.5	372	1.72%
9.5.2	367	1.69%
10.0.5	357	1.65%
9.6.2	336	1.55%
9.5.1	324	1.49%
10.0.2	324	1.49%
12.0.0	321	1.48%
9.5.6	308	1.42%
9.6.4	288	1.33%
8.1.3	272	1.25%
9.0.4	257	1.19%
10.0.4	250	1.15%
11.0.2	227	1.05%
Other	3,026	13.96%
IMail (9,597 servers)
Version	Number of Servers	Percent
8.22	1,757	18.31%
11.5	1,495	15.58%
8.15	630	6.56%
11.03	570	5.94%
9.23	559	5.82%
11.01	480	5.00%
8.05	382	3.98%
9.10	381	3.97%
11.02	357	3.72%
9.20	356	3.71%
10.02	287	2.99%
11.0	280	2.92%
7.07	238	2.48%
7.15	217	2.26%
8.00	188	1.96%
6.06	171	1.78%
10.01	140	1.46%
9.21	115	1.20%
8.04	98	1.02%
Other	896	9.34%
Lotus Domino (5,008 servers)
Version	Number of Servers	Percent
8.5.2	528	10.54%
8.5.3	436	8.71%
8.5.2FP2	417	8.33%
8.5.1	320	6.39%
7.0.2	267	5.33%
8.5.2FP3	260	5.19%
8.5	226	4.51%
8.5.2FP1	193	3.85%
7.0.3	153	3.06%
7.0.1	122	2.44%
8.5.1FP5	118	2.36%
8.0.1	117	2.34%
8.0.2	114	2.28%
6.5.4	106	2.12%
6.5.1	101	2.02%
6.5.3	85	1.70%
8.0	82	1.64%
7.0	80	1.60%
8.5.1FP3	74	1.48%
6.5.5	71	1.42%
7.0.3FP1	67	1.34%
6.5	64	1.28%
8.5.1FP4	64	1.28%
7.0.2FP2	60	1.20%
8.5.1FP2	51	1.02%
Other	832	16.61%
WinWebMail (4,076 servers)
Version	Number of Servers	Percent
3.8.1.3	940	23.06%
3.8.0.1	690	16.93%
3.7.6.1	523	12.83%
3.7.3.1	357	8.76%
3.8.1.1	341	8.37%
3.7.7.3	339	8.32%
3.8.1.5	189	4.64%
3.7.1.1	172	4.22%
3.7.5.1	126	3.09%
3.7.7.1	98	2.40%
3.6.3.1	79	1.94%
3.7.0.3	73	1.79%
3.7.0.5	70	1.72%
3.7.0.7	55	1.35%
Other	24	0.59%
CommuniGate Pro (3,418 servers)
Version	Number of Servers	Percent
5.1.16	265	7.75%
5.4.2	219	6.41%
4.1.8	176	5.15%
5.4.1	171	5.00%
5.3.13	128	3.74%
5.2.20	122	3.57%
5.2.16	92	2.69%
4.2.10	87	2.55%
5.3.8	83	2.43%
5.4.0	78	2.28%
5.2.3	72	2.11%
5.3.12	72	2.11%
5.0.14	71	2.08%
5.2.19	68	1.99%
5.2.14	62	1.81%
5.1.12	61	1.78%
5.3.14	58	1.70%
5.3.10	58	1.70%
5.3.9	57	1.67%
5.1.13	50	1.46%
5.2.8	47	1.38%
5.2.12	46	1.35%
5.4	46	1.35%
5.2.13	41	1.20%
5.3.11	40	1.17%
5.1.14	35	1.02%
Other	1,113	32.56%
XMail (2,408 servers)
Version	Number of Servers	Percent
1.22	571	23.71%
1.25	476	19.77%
1.27	446	18.52%
1.26	313	13.00%
1.24	233	9.68%
1.21	102	4.24%
1.23	58	2.41%
1.20	50	2.08%
1.17	39	1.62%
1.12	32	1.33%
Other	88	3.65%
Kerio (2,185 servers)
Version	Number of Servers	Percent
6.7.3	308	14.10%
6.6.2	228	10.43%
6.7.0	199	9.11%
6.5.0	151	6.91%
6.5.2	144	6.59%
6.7.2	144	6.59%
6.4.1	117	5.35%
6.7.1	115	5.26%
6.3.1	100	4.58%
6.4.0	88	4.03%
6.6.0	80	3.66%
6.5.1	76	3.48%
6.6.1	68	3.11%
6.4.2	51	2.33%
6.3.0	36	1.65%
6.2.0	26	1.19%
6.1.3	24	1.10%
6.2.2	22	1.01%
6.1.0	22	1.01%
Other	186	8.51%
Qmail Toaster (1,715 servers)
Version	Number of Servers	Percent
1.3	1,619	94.40%
1.2	69	4.02%
1.0	19	1.11%
Other	8	0.47%
Merak (1,644 servers)
Version	Number of Servers	Percent
8.0.3	669	40.69%
8.9.1	170	10.34%
8.5.0	121	7.36%
7.5.2	76	4.62%
7.6.4	74	4.50%
8.3.8	69	4.20%
7.4.5	61	3.71%
9.0.0	30	1.82%
7.4.2	25	1.52%
7.2.0	23	1.40%
8.3.15	22	1.34%
7.0.1	21	1.28%
7.6.1	21	1.28%
8.2.4	20	1.22%
6.2.1	19	1.16%
8.9.0	19	1.16%
4.4.2	18	1.09%
Other	186	11.31%
SurgeSMTP (1,265 servers)
Version	Number of Servers	Percent
5.3h2-2	351	27.75%
5.2a-1	161	12.73%
3.9e-1	89	7.04%
4.2d4-4	85	6.72%
3.8k4-4	43	3.40%
5.0e4-4	43	3.40%
5.3h-1	43	3.40%
4.0u4-4	41	3.24%
3.8i3-3	24	1.90%
4.2d2-2	24	1.90%
4.3g2-2	22	1.74%
5.0e3-3	18	1.42%
3.7b8-8	17	1.34%
3.6f5-5	17	1.34%
4.3g4-4	16	1.26%
3.9h-18	15	1.19%
4.2a3-3	15	1.19%
4.3e-1	13	1.03%
3.9c-1	13	1.03%
5.1c2-2	13	1.03%
5.1c-1	13	1.03%
Other	189	14.94%
ArGoSoft (1,031 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	240	23.28%
1.8 (1.8.9.5)	169	16.39%
1.8 (1.8.9.3)	129	12.51%
1.8 (1.8.9.1)	95	9.21%
1.8 (1.8.8.8)	76	7.37%
1.8 (1.8.8.7)	52	5.04%
1.8 (1.8.9.2)	42	4.07%
1.8 (1.8.9.4)	27	2.62%
1.8 (1.8.6.0)	19	1.84%
1.8 (1.8.8.1)	16	1.55%
1.8 (1.8.8.9)	15	1.45%
1.8 (1.8.9.0)	11	1.07%
Other	140	13.58%
GroupWise (791 servers)
Version	Number of Servers	Percent
7.0.3	168	21.24%
8.0.2	168	21.24%
6.5.7	88	11.13%
7.0.2	60	7.59%
8.0.1	52	6.57%
7.0.4	51	6.45%
7.0.1	31	3.92%
6.5.4	30	3.79%
6.5.6	24	3.03%
6.0.4	22	2.78%
8.0.0	19	2.40%
6.5.1	19	2.40%
6.5.5	14	1.77%
7.0	11	1.39%
Other	34	4.30%
Trend Micro (475 servers)
Version	Number of Servers	Percent
5.7	201	42.32%
5.5	111	23.37%
5.18	86	18.11%
7.0	49	10.32%
7.1	17	3.58%
Other	11	2.32%
Post.Office (448 servers)
Version	Number of Servers	Percent
3.5.3	67	14.96%
4.1.0.2	49	10.94%
4.0.1	37	8.26%
4.1.2.4	29	6.47%
4.1.1	21	4.69%
3.5.3J	19	4.24%
3.9.2.3	18	4.02%
3.8.3	14	3.12%
3.9.2	12	2.68%
4.2	11	2.46%
3.1.2J	11	2.46%
3.1.2	10	2.23%
4.1.0.3	10	2.23%
4.0.1.1	9	2.01%
3.6.2	9	2.01%
3.8.7.4	9	2.01%
4.1.2.3	8	1.79%
4.1.0.4	8	1.79%
4.1.2.2	7	1.56%
3.9.2.1	7	1.56%
4.0.0.2	7	1.56%
4.0.0.1	6	1.34%
3.9.1.2	5	1.12%
4.1	5	1.12%
3.9.1.3	5	1.12%
3.5.2	5	1.12%
3.9.1	5	1.12%
3.5.1	5	1.12%
Other	40	8.93%
Gordano Messaging Suite (GMS) (417 servers)
Version	Number of Servers	Percent
Other	417	100.00%
MagicMail (357 servers)
Version	Number of Servers	Percent
Other	357	100.00%
Mirapoint (240 servers)
Version	Number of Servers	Percent
4.2.3-GA	29	12.08%
3.10.10a-GA	22	9.17%
3.8.4-GA	21	8.75%
3.10.5-GA	18	7.50%
3.8.3-GA	14	5.83%
4.1.10-GA	14	5.83%
3.10.9-GA	14	5.83%
3.10.8-GA	13	5.42%
4.1.3-GA	11	4.58%
4.1.9-GA	9	3.75%
3.10.7-GA	9	3.75%
4.1.8-GA	7	2.92%
4.1.4-GA	6	2.50%
3.10.3-GA	6	2.50%
3.8.5-GA	5	2.08%
3.8.2-GA	5	2.08%
3.10.4-GA	4	1.67%
3.8.7a	4	1.67%
3.7.5a-GA	3	1.25%
3.8.6-GA	3	1.25%
4.2.4-GA	3	1.25%
4.1.5-GA	3	1.25%
Other	17	7.08%
InterScan VirusWall (179 servers)
Version	Number of Servers	Percent
Other	179	100.00%
VisNetic (178 servers)
Version	Number of Servers	Percent
9.3.2.0	52	29.21%
9.1.4.1	27	15.17%
5.8.6.6	10	5.62%
8.5.0.8	9	5.06%
5.5.8.3	8	4.49%
7.6.1.0	7	3.93%
8.0.3.1	6	3.37%
8.3.5.0	5	2.81%
8.0.3.0	5	2.81%
8.0.3	5	2.81%
5.0.2.3	5	2.81%
6.2.2.0	4	2.25%
5.3.5.0	4	2.25%
9.1.4.0	4	2.25%
5.0.2.1	3	1.69%
7.2.4.1	3	1.69%
5.4.5.4	3	1.69%
8.3.0.1	2	1.12%
7-6-1-0	2	1.12%
Other	14	7.87%
NetIQ MailMarshal (71 servers)
Version	Number of Servers	Percent
6.0.3.8	48	67.61%
6.1.3.15	7	9.86%
5.5.6.7	7	9.86%
5.5.6.5	2	2.82%
5.5.4.16	2	2.82%
5.5.5.9	1	1.41%
5.5.4.17	1	1.41%
5.5.6.6	1	1.41%
5.5.3.17	1	1.41%
5.5.5.6	1	1.41%
Other	0	0.00%
Interscan (67 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	13	19.40%
3.81-Build_1022	8	11.94%
3.55 (build 1029)	8	11.94%
3.8-Build_3013	7	10.45%
3.53 (build 2017)	5	7.46%
3.81-Build_1084	5	7.46%
3.53 (build 1493)	3	4.48%
3.53 (build 2011)	3	4.48%
3.55 (build 1020)	3	4.48%
3.52 (build 1375)	3	4.48%
3.53 (build 2013)	2	2.99%
3.81-Build_1055	1	1.49%
3.51 (build 1321)	1	1.49%
3.5 (build 1294)	1	1.49%
3.51 (build 1337)	1	1.49%
3.6-Build_1246	1	1.49%
3.8-Build_3045	1	1.49%
3.8-Build_1080	1	1.49%
Other	0	0.00%
Mercury (54 servers)
Version	Number of Servers	Percent
1.48	29	53.70%
3.32	15	27.78%
3.01a	2	3.70%
1.47	2	3.70%
3.21c	2	3.70%
3.21	1	1.85%
3.31	1	1.85%
4.x	1	1.85%
3.30	1	1.85%
Other	0	0.00%
WebSTAR V (43 servers)
Version	Number of Servers	Percent
5.4.1	20	46.51%
5.4.0	9	20.93%
5.3.4	6	13.95%
5.3.3	5	11.63%
5.3.2	2	4.65%
5.3.0	1	2.33%
Other	0	0.00%
Neon Mail Server (41 servers)
Version	Number of Servers	Percent
3.1.3	11	26.83%
3.0.7	9	21.95%
3.0.9	6	14.63%
3.1.4	4	9.76%
3.1.0	4	9.76%
3.1.2	3	7.32%
3.1.1	2	4.88%
3.1.5	1	2.44%
3.0.6	1	2.44%
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 (20 servers)
Version	Number of Servers	Percent
1.0.8	19	95.00%
1.0.6	1	5.00%
Other	0	0.00%
OpenSMTPD (18 servers)
Version	Number of Servers	Percent
Other	18	100.00%
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%
MAILsweeper (9 servers)
Version	Number of Servers	Percent
4.3.17.0	3	33.33%
4.3.20.0	2	22.22%
4.3.19.0	2	22.22%
4.3.14.0	1	11.11%
4.3.6.0	1	11.11%
Other	0	0.00%