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	2,392,452	100.0%
Number of Servers that didn't respond	439,384	18.37%
Server didn't open socket	430,385	17.99%
Server didn't provide banner	8,999	0.38%
Server provided banner	1,953,068	81.63%
Server banner identifies software in use	1,143,704	47.80%

As indicated by the above table, of the 2,392,452 servers queried, only 1,143,704 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	607,198	53.09%
Postfix	371,749	32.50%
Sendmail	77,250	6.75%
MailEnable	28,711	2.51%
Microsoft	24,677	2.16%
MDaemon	17,370	1.52%
IMail	3,728	0.33%
CommuniGate Pro	2,439	0.21%
Lotus Domino	2,128	0.19%
WinWebMail	1,793	0.16%
XMail	1,525	0.13%
Qmail Toaster	1,161	0.10%
SurgeSMTP	825	0.07%
Kerio	779	0.07%
Merak	509	0.04%
ArGoSoft	364	0.03%
OpenSMTPD	274	0.02%
MagicMail	242	0.02%
Post.Office	223	0.02%
GroupWise	192	0.02%
Gordano Messaging Suite (GMS)	192	0.02%
Trend Micro	121	0.01%
InterScan VirusWall	64	0.01%
VisNetic	45	0.00%
Mirapoint	44	0.00%
Mercury	23	0.00%
OpenVMS	20	0.00%
Interscan	14	0.00%
WebSTAR V	13	0.00%
ModusMail	11	0.00%
Neon Mail Server	10	0.00%
MessageWall	6	0.00%
NetIQ MailMarshal	2	0.00%
WebSTAR	1	0.00%
MAILsweeper	1	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (607,198 servers)
Version	Number of Servers	Percent
4.85	314,297	51.76%
4.86	123,496	20.34%
4.84	63,577	10.47%
4.82	18,105	2.98%
4.80	18,031	2.97%
4.72	17,350	2.86%
4.80.1	16,783	2.76%
4.76	14,810	2.44%
Other	20,749	3.42%
Postfix (371,749 servers)
Version	Number of Servers	Percent
Other	371,749	100.00%
Sendmail (77,250 servers)
Version	Number of Servers	Percent
8.14.5	17,169	22.23%
8.13.8	15,390	19.92%
8.14.4	14,486	18.75%
8.13.1	9,297	12.03%
8.14.3	5,135	6.65%
8.14.9	1,883	2.44%
8.14.7	1,840	2.38%
8.12.11.20060308	1,749	2.26%
8.13.6.20060614	1,134	1.47%
8.14.2	949	1.23%
8.12.10	802	1.04%
8.11.6	794	1.03%
Other	6,622	8.57%
MailEnable (28,711 servers)
Version	Number of Servers	Percent
8.60--	2,642	9.20%
6.5--	1,818	6.33%
1.986--	1,723	6.00%
8.53--	1,573	5.48%
8.51--	1,119	3.90%
5.10--	908	3.16%
8.60-8.60-	858	2.99%
8.04--	842	2.93%
4.26--	653	2.27%
8.00--	644	2.24%
8.50--	637	2.22%
6.0--	603	2.10%
7.06--	596	2.08%
8.60--8.60	531	1.85%
7.07--	386	1.34%
8.55--	386	1.34%
9.00--	378	1.32%
6.88-6.88-	366	1.27%
7.0--	365	1.27%
7.50--	352	1.23%
6.57--	344	1.20%
6.70--	330	1.15%
9.00--9.00	325	1.13%
1.981--	322	1.12%
7.53--	312	1.09%
Other	9,698	33.78%
Microsoft (24,677 servers)
Version	Number of Servers	Percent
6.0.3790.4675	17,954	72.76%
6.0.3790.3959	1,980	8.02%
7.5.7601.17514	1,789	7.25%
6.0.3790.1830	583	2.36%
8.5.9600.16384	497	2.01%
7.0.6002.18264	415	1.68%
5.0.2195.7381	291	1.18%
8.0.9200.16384	282	1.14%
Other	886	3.59%
MDaemon (17,370 servers)
Version	Number of Servers	Percent
15.0.3	2,229	12.83%
15.5.0	1,135	6.53%
15.5.1	951	5.47%
11.0.3	878	5.05%
11.0.0	763	4.39%
13.5.1	724	4.17%
13.0.5	693	3.99%
13.0.4	683	3.93%
13.6.3	407	2.34%
12.5.6	395	2.27%
10.0.0	379	2.18%
14.5.2	367	2.11%
12.5.4	313	1.80%
15.0.1	312	1.80%
14.5.3	311	1.79%
14.0.3	311	1.79%
10.1.2	308	1.77%
10.1.1	250	1.44%
14.0.2	214	1.23%
10.1.0	212	1.22%
9.6.1	209	1.20%
13.6.2	202	1.16%
13.0.2	196	1.13%
15.0.0	191	1.10%
9.6.6	188	1.08%
9.6.2	178	1.02%
Other	4,371	25.16%
IMail (3,728 servers)
Version	Number of Servers	Percent
8.22	410	11.00%
12.5.3.93	360	9.66%
12.4.2.27	282	7.56%
12.3.0.100	275	7.38%
9.23	247	6.63%
12.4.1.15	198	5.31%
8.15	182	4.88%
8.05	152	4.08%
12.5.1.60	120	3.22%
12.2.0.235	113	3.03%
12.5.3.99	113	3.03%
11.5	112	3.00%
11.03	103	2.76%
12.5.2.62	94	2.52%
12.5.0.246	64	1.72%
10.02	62	1.66%
11.02	62	1.66%
7.07	56	1.50%
12.4.1.9	56	1.50%
7.15	51	1.37%
11.01	48	1.29%
12.1.0.270	45	1.21%
8.00	45	1.21%
Other	478	12.82%
CommuniGate Pro (2,439 servers)
Version	Number of Servers	Percent
5.1.16	260	10.66%
6.0.11	139	5.70%
6.1.5	124	5.08%
6.0.9	124	5.08%
6.1.2	114	4.67%
5.4.11	87	3.57%
5.2.20	85	3.49%
6.1.6	69	2.83%
6.0.10	66	2.71%
6.0.7	56	2.30%
5.3.13	55	2.26%
5.2.3	51	2.09%
6.1.4	50	2.05%
4.1.8	48	1.97%
5.3.15	46	1.89%
5.0.14	45	1.85%
6.0.5	43	1.76%
6.0.8	40	1.64%
5.2.16	29	1.19%
5.4.6	29	1.19%
5.4.8	27	1.11%
6.1.1	27	1.11%
5.1.12	27	1.11%
4.2.10	26	1.07%
5.4.10	25	1.03%
Other	747	30.63%
Lotus Domino (2,128 servers)
Version	Number of Servers	Percent
8.5.3FP6	322	15.13%
8.5.3	292	13.72%
8.5.2	105	4.93%
8.5.1	72	3.38%
8.5.3FP3	72	3.38%
7.0.2	69	3.24%
8.5.3FP2	64	3.01%
8.5.2FP4	64	3.01%
8.5	61	2.87%
8.5.2FP3	53	2.49%
8.5.3FP4	52	2.44%
8.5.2FP2	49	2.30%
8.5.3FP5	49	2.30%
8.5.3FP1	48	2.26%
7.0.3	44	2.07%
8.5.1FP5	35	1.64%
7.0	34	1.60%
8.0.1	33	1.55%
7.0.1	32	1.50%
8.0	29	1.36%
6.5.1	29	1.36%
8.5.2FP1	27	1.27%
8.0.2	23	1.08%
6.5.4	22	1.03%
7.0.4	22	1.03%
6.5.3	22	1.03%
Other	404	18.98%
WinWebMail (1,793 servers)
Version	Number of Servers	Percent
3.9.0.7	303	16.90%
3.8.1.3	298	16.62%
3.7.6.1	151	8.42%
3.8.0.1	136	7.59%
3.9.0.1	124	6.92%
3.8.1.5	98	5.47%
3.8.1.1	94	5.24%
3.7.3.1	88	4.91%
3.8.5.1	81	4.52%
3.7.7.3	69	3.85%
3.8.6.1	66	3.68%
3.8.2.1	47	2.62%
3.7.1.1	46	2.57%
3.8.3.1	26	1.45%
3.7.5.1	23	1.28%
3.8.3.3	22	1.23%
3.7.0.5	20	1.12%
3.9.0.5	19	1.06%
Other	82	4.57%
XMail (1,525 servers)
Version	Number of Servers	Percent
1.27	587	38.49%
1.22	443	29.05%
1.25	173	11.34%
1.26	124	8.13%
1.24	67	4.39%
1.21	35	2.30%
1.23	22	1.44%
1.20	17	1.11%
Other	57	3.74%
Qmail Toaster (1,161 servers)
Version	Number of Servers	Percent
1.3	1,091	93.97%
1.2	20	1.72%
1.03.5	15	1.29%
Other	35	3.01%
SurgeSMTP (825 servers)
Version	Number of Servers	Percent
6.9c-1	166	20.12%
6.5a2-2	103	12.48%
6.7c-1	76	9.21%
7.0c2-2	50	6.06%
6.5a-1	43	5.21%
6.3c2-2	29	3.52%
5.2a-1	21	2.55%
3.9e-1	19	2.30%
3.8k4-4	18	2.18%
6.4a-1	18	2.18%
5.3h2-2	17	2.06%
6.9d-29	15	1.82%
7.0c-1	14	1.70%
7.0f-15	13	1.58%
6.1c-1	11	1.33%
7.0f-4	10	1.21%
7.0e-1	9	1.09%
6.0a5-5	9	1.09%
Other	184	22.30%
Kerio (779 servers)
Version	Number of Servers	Percent
6.7.3	159	20.41%
6.7.0	78	10.01%
6.6.2	66	8.47%
6.5.2	59	7.57%
6.5.0	51	6.55%
6.4.1	42	5.39%
6.7.2	41	5.26%
6.7.1	37	4.75%
6.6.1	36	4.62%
6.3.1	36	4.62%
6.5.1	28	3.59%
6.3.0	18	2.31%
6.4.2	17	2.18%
6.4.0	17	2.18%
6.6.0	14	1.80%
6.1.3	10	1.28%
Other	70	8.99%
Merak (509 servers)
Version	Number of Servers	Percent
8.0.3	161	31.63%
8.9.1	71	13.95%
8.5.0	40	7.86%
8.3.8	30	5.89%
7.4.5	24	4.72%
7.5.2	24	4.72%
7.6.4	19	3.73%
7.6.1	13	2.55%
7.0.1	12	2.36%
8.3.15	12	2.36%
7.2.0	9	1.77%
7.4.2	8	1.57%
8.9.0	8	1.57%
8.2.4	6	1.18%
Other	72	14.15%
ArGoSoft (364 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	110	30.22%
1.8 (1.8.9.3)	50	13.74%
1.8 (1.8.9.5)	47	12.91%
1.8 (1.8.9.1)	33	9.07%
1.8 (1.8.8.7)	21	5.77%
1.8 (1.8.8.8)	20	5.49%
1.8 (1.8.9.2)	12	3.30%
1.8 (1.8.9.4)	8	2.20%
1.8 (1.8.6.0)	7	1.92%
1.8 (1.8.7.3)	6	1.65%
1.8 (1.8.8.2)	4	1.10%
1.8 (1.8.9.0)	4	1.10%
1.8 (1.8.8.9)	4	1.10%
Other	38	10.44%
OpenSMTPD (274 servers)
Version	Number of Servers	Percent
Other	274	100.00%
MagicMail (242 servers)
Version	Number of Servers	Percent
Other	242	100.00%
Post.Office (223 servers)
Version	Number of Servers	Percent
4.2.2	46	20.63%
3.5.3	31	13.90%
4.1.2.4	26	11.66%
4.3	19	8.52%
4.1.0.2	9	4.04%
4.1.1	9	4.04%
4.2.1.3	8	3.59%
4.0.1	7	3.14%
3.9.2.3	7	3.14%
3.1.2J	6	2.69%
4.2.1.1	6	2.69%
4.2	5	2.24%
3.5.3J	4	1.79%
3.8.7.4	4	1.79%
3.9.2	3	1.35%
4.1.2.3	3	1.35%
4.1.0.3	3	1.35%
3.1.2	3	1.35%
3.5.1	3	1.35%
Other	21	9.42%
GroupWise (192 servers)
Version	Number of Servers	Percent
14.0.1	25	13.02%
7.0.3	20	10.42%
8.0.3	19	9.90%
6.5.7	18	9.38%
14.0.2	16	8.33%
8.0.2	13	6.77%
7.0.4	13	6.77%
7.0.2	10	5.21%
14.0.0	8	4.17%
12.0.2	6	3.12%
7.0.1	5	2.60%
14.2.0	5	2.60%
6.0.4	4	2.08%
6.5.4	3	1.56%
12.0.3	3	1.56%
6.0.3	3	1.56%
6.5.6	3	1.56%
8.0.1	2	1.04%
8.0.0	2	1.04%
6.5.5	2	1.04%
12.0.1	2	1.04%
12.0.0	2	1.04%
6.0.2	2	1.04%
Other	6	3.12%
Gordano Messaging Suite (GMS) (192 servers)
Version	Number of Servers	Percent
Other	192	100.00%
Trend Micro (121 servers)
Version	Number of Servers	Percent
5.7	46	38.02%
5.5	25	20.66%
5.18	21	17.36%
7.0	10	8.26%
7.1	7	5.79%
8.5	4	3.31%
3.53	3	2.48%
Other	5	4.13%
InterScan VirusWall (64 servers)
Version	Number of Servers	Percent
Other	64	100.00%
VisNetic (45 servers)
Version	Number of Servers	Percent
9.3.2.0	11	24.44%
9.1.4.1	5	11.11%
6.2.2.0	4	8.89%
5.0.2.3	3	6.67%
8.5.0.8	3	6.67%
9.1.4.0	2	4.44%
7.2.4.1	2	4.44%
5.5.8.3	2	4.44%
5.3.5.0	2	4.44%
8.0.3	1	2.22%
8.3.0.1	1	2.22%
8.5.0.5	1	2.22%
6.0.7.4	1	2.22%
5.4.5.4	1	2.22%
8.0.3.1	1	2.22%
7.6.1.0	1	2.22%
5.8.6.6	1	2.22%
5.0.2.0	1	2.22%
7.2.4.0	1	2.22%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	2.22%
Other	0	0.00%
Mirapoint (44 servers)
Version	Number of Servers	Percent
4.4.3-GA	7	15.91%
4.3.5-GA	6	13.64%
4.3.6-GA	5	11.36%
4.4.2a-FCS	4	9.09%
4.4.5-GA	4	9.09%
3.10.10a-GA	2	4.55%
4.4.4-GA	2	4.55%
4.4.5a-GA	2	4.55%
4.1.10-GA	2	4.55%
4.1.5-GA	2	4.55%
4.1.9-GA	1	2.27%
3.10.4-GA	1	2.27%
4.1.6-GA	1	2.27%
3.7.5a-GA	1	2.27%
4.3.3-GA	1	2.27%
3.8.7a	1	2.27%
3.8.4-GA	1	2.27%
4.4.6-GA	1	2.27%
Other	0	0.00%
Mercury (23 servers)
Version	Number of Servers	Percent
3.32	11	47.83%
1.48	10	43.48%
3.21	1	4.35%
4.x	1	4.35%
Other	0	0.00%
OpenVMS (20 servers)
Version	Number of Servers	Percent
8.3	9	45.00%
7.3	6	30.00%
8.4	5	25.00%
Other	0	0.00%
Interscan (14 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	3	21.43%
3.81-Build_1084	2	14.29%
3.81-Build_1022	2	14.29%
3.55 (build 1029)	2	14.29%
3.5 (build 1294)	1	7.14%
3.8-Build_3013	1	7.14%
3.53 (build 2013)	1	7.14%
3.53 (build 2017)	1	7.14%
3.8-Build_1080	1	7.14%
Other	0	0.00%
WebSTAR V (13 servers)
Version	Number of Servers	Percent
5.4.1	6	46.15%
5.4.0	4	30.77%
5.3.3	1	7.69%
5.3.4	1	7.69%
5.3.2	1	7.69%
Other	0	0.00%
ModusMail (11 servers)
Version	Number of Servers	Percent
4.35.477.0	6	54.55%
4.1.361.21	2	18.18%
3.2.315.0	1	9.09%
4.35.477.8	1	9.09%
3.1.302.0	1	9.09%
Other	0	0.00%
Neon Mail Server (10 servers)
Version	Number of Servers	Percent
3.0.7	4	40.00%
3.1.0	2	20.00%
3.1.4	1	10.00%
3.1.2	1	10.00%
3.1.3	1	10.00%
3.0.8	1	10.00%
Other	0	0.00%
MessageWall (6 servers)
Version	Number of Servers	Percent
1.0.8	6	100.00%
Other	0	0.00%
NetIQ MailMarshal (2 servers)
Version	Number of Servers	Percent
5.5.6.5	1	50.00%
5.5.4.17	1	50.00%
Other	0	0.00%
WebSTAR (1 servers)
Version	Number of Servers	Percent
Other	1	100.00%
MAILsweeper (1 servers)
Version	Number of Servers	Percent
4.3.20.0	1	100.00%
Other	0	0.00%