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	1,866,326	100.0%
Number of Servers that didn't respond	310,048	16.61%
Server didn't open socket	303,166	16.24%
Server didn't provide banner	6,882	0.37%
Server provided banner	1,556,278	83.39%
Server banner identifies software in use	949,169	50.86%

As indicated by the above table, of the 1,866,326 servers queried, only 949,169 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	530,856	55.93%
Postfix	308,257	32.48%
Sendmail	52,221	5.50%
MailEnable	22,826	2.40%
MDaemon	12,587	1.33%
Microsoft	11,679	1.23%
IMail	2,183	0.23%
CommuniGate Pro	1,781	0.19%
Lotus Domino	1,090	0.11%
WinWebMail	1,083	0.11%
XMail	1,060	0.11%
Qmail Toaster	822	0.09%
SurgeSMTP	653	0.07%
Kerio	473	0.05%
Merak	304	0.03%
MagicMail	259	0.03%
OpenSMTPD	245	0.03%
ArGoSoft	218	0.02%
Post.Office	150	0.02%
Gordano Messaging Suite (GMS)	109	0.01%
GroupWise	104	0.01%
Trend Micro	73	0.01%
InterScan VirusWall	33	0.00%
VisNetic	25	0.00%
Mirapoint	24	0.00%
OpenVMS	11	0.00%
ModusMail	9	0.00%
Mercury	7	0.00%
WebSTAR V	7	0.00%
MessageWall	6	0.00%
Neon Mail Server	5	0.00%
Interscan	4	0.00%
WebSTAR	2	0.00%
NetIQ MailMarshal	2	0.00%
MAILsweeper	1	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (530,856 servers)
Version	Number of Servers	Percent
4.87	346,135	65.20%
4.86	94,460	17.79%
4.84	17,901	3.37%
4.80	12,089	2.28%
4.85	10,432	1.97%
4.72	10,272	1.93%
4.76	8,388	1.58%
4.82	7,953	1.50%
4.80.1	6,844	1.29%
Other	16,382	3.09%
Postfix (308,257 servers)
Version	Number of Servers	Percent
Other	308,257	100.00%
Sendmail (52,221 servers)
Version	Number of Servers	Percent
8.14.5	12,783	24.48%
8.14.4	11,115	21.28%
8.13.8	9,556	18.30%
8.13.1	5,659	10.84%
8.14.3	2,698	5.17%
8.15.2	1,766	3.38%
8.14.9	1,518	2.91%
8.14.7	1,329	2.54%
8.12.11.20060308	820	1.57%
8.14.2	548	1.05%
Other	4,429	8.48%
MailEnable (22,826 servers)
Version	Number of Servers	Percent
9.00--	2,577	11.29%
8.60--	1,541	6.75%
8.53--	1,195	5.24%
6.5--	1,077	4.72%
1.986--	925	4.05%
8.51--	821	3.60%
8.04--	596	2.61%
5.10--	483	2.12%
8.60-8.60-	475	2.08%
8.50--	469	2.05%
8.00--	394	1.73%
4.26--	349	1.53%
6.0--	343	1.50%
7.06--	330	1.45%
9.12--	323	1.42%
7.07--	241	1.06%
Other	10,687	46.82%
MDaemon (12,587 servers)
Version	Number of Servers	Percent
16.0.4	1,569	12.47%
16.5.0	1,300	10.33%
13.5.1	575	4.57%
11.0.3	520	4.13%
13.0.4	501	3.98%
11.0.0	501	3.98%
13.0.5	480	3.81%
15.0.3	363	2.88%
13.6.3	338	2.69%
15.5.3	322	2.56%
12.5.6	274	2.18%
16.0.2	269	2.14%
16.0.1	248	1.97%
10.0.0	237	1.88%
12.5.4	228	1.81%
14.5.2	220	1.75%
10.1.2	190	1.51%
15.5.2	179	1.42%
16.0.3	158	1.26%
10.1.1	141	1.12%
10.1.0	131	1.04%
9.6.6	127	1.01%
14.0.3	126	1.00%
Other	3,590	28.52%
Microsoft (11,679 servers)
Version	Number of Servers	Percent
6.0.3790.4675	7,611	65.17%
7.5.7601.17514	1,193	10.21%
6.0.3790.3959	892	7.64%
8.5.9600.16384	590	5.05%
6.0.3790.1830	236	2.02%
7.0.6002.18264	221	1.89%
8.0.9200.16384	195	1.67%
5.0.2195.5329	152	1.30%
5.0.2195.7381	132	1.13%
Other	457	3.91%
IMail (2,183 servers)
Version	Number of Servers	Percent
12.5.4.146	240	10.99%
12.5.5.115	219	10.03%
8.22	190	8.70%
12.4.1.15	186	8.52%
12.5.3.93	176	8.06%
9.23	138	6.32%
8.15	113	5.18%
12.3.0.100	105	4.81%
8.05	91	4.17%
11.03	70	3.21%
11.5	58	2.66%
12.2.0.235	39	1.79%
7.07	38	1.74%
10.02	34	1.56%
7.15	32	1.47%
12.5.1.60	32	1.47%
12.5.3.99	32	1.47%
11.02	28	1.28%
12.4.1.9	27	1.24%
12.5.2.62	24	1.10%
8.00	23	1.05%
12.1.0.270	22	1.01%
Other	266	12.19%
CommuniGate Pro (1,781 servers)
Version	Number of Servers	Percent
5.1.16	177	9.94%
6.1.11	160	8.98%
6.1.10	85	4.77%
6.0.11	72	4.04%
5.2.20	65	3.65%
5.4.11	65	3.65%
6.0.9	60	3.37%
6.1.12	51	2.86%
6.1.8	49	2.75%
6.1.2	41	2.30%
6.1.5	39	2.19%
6.1.7	38	2.13%
5.3.13	37	2.08%
5.3.15	34	1.91%
5.0.14	34	1.91%
6.0.10	34	1.91%
5.2.3	33	1.85%
4.1.8	28	1.57%
6.1.9	28	1.57%
5.2.16	23	1.29%
6.1.4	22	1.24%
6.1.6	21	1.18%
5.1.12	20	1.12%
6.0.7	19	1.07%
5.4.8	18	1.01%
Other	528	29.65%
Lotus Domino (1,090 servers)
Version	Number of Servers	Percent
8.5.3FP6	200	18.35%
8.5.3	155	14.22%
8.5.2	52	4.77%
8.5.1	43	3.94%
8.5	35	3.21%
7.0.2	35	3.21%
8.5.3FP4	34	3.12%
8.5.2FP4	32	2.94%
8.5.3FP2	32	2.94%
8.5.2FP3	28	2.57%
8.5.3FP3	23	2.11%
8.5.3FP1	22	2.02%
8.5.3FP5	21	1.93%
8.0.1	21	1.93%
8.5.2FP2	21	1.93%
7.0.1	20	1.83%
7.0.3	19	1.74%
7.0	18	1.65%
8.5.1FP5	17	1.56%
8.0	17	1.56%
6.5.1	15	1.38%
6.5.4	13	1.19%
5.0.8	12	1.10%
8.5.2FP1	11	1.01%
7.0.3FP1	11	1.01%
7.0.2FP2	11	1.01%
Other	172	15.78%
WinWebMail (1,083 servers)
Version	Number of Servers	Percent
3.9.0.7	279	25.76%
3.8.1.3	159	14.68%
3.7.6.1	77	7.11%
3.9.0.1	74	6.83%
3.8.0.1	73	6.74%
3.8.1.5	56	5.17%
3.7.3.1	49	4.52%
3.8.5.1	45	4.16%
3.8.1.1	44	4.06%
3.8.6.1	39	3.60%
3.7.7.3	39	3.60%
3.8.2.1	28	2.59%
3.7.1.1	22	2.03%
3.8.3.1	20	1.85%
3.7.0.5	11	1.02%
3.7.5.1	11	1.02%
Other	57	5.26%
XMail (1,060 servers)
Version	Number of Servers	Percent
1.27	444	41.89%
1.22	309	29.15%
1.25	94	8.87%
1.26	84	7.92%
1.24	49	4.62%
1.21	25	2.36%
1.23	12	1.13%
Other	43	4.06%
Qmail Toaster (822 servers)
Version	Number of Servers	Percent
1.3	760	92.46%
1.03	20	2.43%
1.2	12	1.46%
1.03.5	10	1.22%
Other	20	2.43%
SurgeSMTP (653 servers)
Version	Number of Servers	Percent
7.1e-1	212	32.47%
6.5a2-2	61	9.34%
6.9c-1	37	5.67%
7.2a-1	35	5.36%
7.0c2-2	34	5.21%
6.7c-1	29	4.44%
6.5a-1	26	3.98%
3.9e-1	19	2.91%
5.2a-1	16	2.45%
6.3c2-2	14	2.14%
6.4a-1	12	1.84%
6.1c-1	12	1.84%
7.1f-32	8	1.23%
4.0u4-4	8	1.23%
3.8k4-4	8	1.23%
5.3h2-2	7	1.07%
Other	115	17.61%
Kerio (473 servers)
Version	Number of Servers	Percent
6.7.3	95	20.08%
6.7.0	43	9.09%
6.5.2	40	8.46%
6.6.2	38	8.03%
6.5.0	34	7.19%
6.7.2	30	6.34%
6.6.1	26	5.50%
6.4.1	26	5.50%
6.7.1	22	4.65%
6.3.1	17	3.59%
6.3.0	16	3.38%
6.5.1	15	3.17%
6.4.0	13	2.75%
6.1.3	8	1.69%
6.6.0	8	1.69%
5.7.9	6	1.27%
Other	36	7.61%
Merak (304 servers)
Version	Number of Servers	Percent
8.0.3	99	32.57%
8.9.1	40	13.16%
8.5.0	25	8.22%
7.5.2	17	5.59%
8.3.8	16	5.26%
7.4.5	16	5.26%
7.6.1	12	3.95%
7.6.4	12	3.95%
8.3.15	9	2.96%
7.2.0	6	1.97%
8.9.0	5	1.64%
7.4.2	4	1.32%
6.0.8	4	1.32%
Other	39	12.83%
MagicMail (259 servers)
Version	Number of Servers	Percent
Other	259	100.00%
OpenSMTPD (245 servers)
Version	Number of Servers	Percent
Other	245	100.00%
ArGoSoft (218 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	70	32.11%
1.8 (1.8.9.5)	27	12.39%
1.8 (1.8.9.3)	21	9.63%
1.8 (1.8.9.1)	21	9.63%
1.8 (1.8.8.8)	12	5.50%
1.8 (1.8.8.7)	7	3.21%
1.8 (1.8.7.3)	6	2.75%
1.8 (1.8.6.0)	6	2.75%
1.8 (1.8.9.2)	5	2.29%
1.8 (1.8.9.4)	4	1.83%
1.8 (1.8.8.9)	4	1.83%
1.8 (1.8.9.0)	3	1.38%
1.8 (1.8.8.2)	3	1.38%
1.8 (1.8.8.4)	3	1.38%
Other	26	11.93%
Post.Office (150 servers)
Version	Number of Servers	Percent
4.2.2	34	22.67%
3.5.3	23	15.33%
4.3	21	14.00%
4.1.2.4	19	12.67%
4.2.1.3	7	4.67%
3.9.2.3	5	3.33%
4.1.1	4	2.67%
3.8.7.4	3	2.00%
3.1.2	3	2.00%
4.2	3	2.00%
3.5.4	2	1.33%
4.0.1	2	1.33%
4.1.2.3	2	1.33%
4.1.0.3	2	1.33%
4.1.0.2	2	1.33%
3.5.1	2	1.33%
3.9.2	2	1.33%
4.2.1.1	2	1.33%
Other	12	8.00%
Gordano Messaging Suite (GMS) (109 servers)
Version	Number of Servers	Percent
Other	109	100.00%
GroupWise (104 servers)
Version	Number of Servers	Percent
14.2.1	26	25.00%
14.2.0	14	13.46%
14.0.1	8	7.69%
14.0.0	8	7.69%
6.5.7	7	6.73%
14.0.2	7	6.73%
7.0.3	6	5.77%
8.0.3	5	4.81%
8.0.2	3	2.88%
7.0.2	2	1.92%
12.0.1	2	1.92%
6.5.4	2	1.92%
6.0.3	2	1.92%
12.0.2	2	1.92%
Other	10	9.62%
Trend Micro (73 servers)
Version	Number of Servers	Percent
5.7	30	41.10%
5.18	16	21.92%
5.5	11	15.07%
7.5	4	5.48%
7.0	4	5.48%
8.5	3	4.11%
7.5ready	1	1.37%
8.5.2	1	1.37%
9.0	1	1.37%
3.53	1	1.37%
8	1	1.37%
Other	0	0.00%
InterScan VirusWall (33 servers)
Version	Number of Servers	Percent
Other	33	100.00%
VisNetic (25 servers)
Version	Number of Servers	Percent
9.3.2.0	8	32.00%
6.2.2.0	2	8.00%
9.1.4.1	2	8.00%
8.0.3	1	4.00%
5.0.2.3	1	4.00%
8.3.0.1	1	4.00%
5.8.6.6	1	4.00%
8.5.0.5	1	4.00%
8.0.3.1	1	4.00%
7.6.1.0	1	4.00%
5.3.5.0	1	4.00%
5.5.8.3	1	4.00%
5.0.2.0	1	4.00%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	4.00%
8.5.0.8	1	4.00%
7.2.4.1	1	4.00%
Other	0	0.00%
Mirapoint (24 servers)
Version	Number of Servers	Percent
4.4.3-GA	4	16.67%
4.4.2a-FCS	3	12.50%
4.4.5-GA	3	12.50%
4.3.5-GA	3	12.50%
4.4.4-GA	2	8.33%
4.4.7-GA	2	8.33%
4.1.10-GA	2	8.33%
4.1.9-GA	1	4.17%
4.4.5a-GA	1	4.17%
4.3.6-GA	1	4.17%
3.10.10a-GA	1	4.17%
4.4.6-GA	1	4.17%
Other	0	0.00%
OpenVMS (11 servers)
Version	Number of Servers	Percent
8.4	5	45.45%
7.3	3	27.27%
8.3	3	27.27%
Other	0	0.00%
ModusMail (9 servers)
Version	Number of Servers	Percent
4.35.477.0	5	55.56%
4.1.361.21	2	22.22%
3.2.315.0	1	11.11%
4.35.477.8	1	11.11%
Other	0	0.00%
Mercury (7 servers)
Version	Number of Servers	Percent
3.32	3	42.86%
1.48	2	28.57%
3.21	1	14.29%
4.x	1	14.29%
Other	0	0.00%
WebSTAR V (7 servers)
Version	Number of Servers	Percent
5.4.1	4	57.14%
5.4.0	1	14.29%
5.3.2	1	14.29%
5.3.4	1	14.29%
Other	0	0.00%
MessageWall (6 servers)
Version	Number of Servers	Percent
1.0.8	6	100.00%
Other	0	0.00%
Neon Mail Server (5 servers)
Version	Number of Servers	Percent
3.1.2	2	40.00%
3.1.0	2	40.00%
3.0.7	1	20.00%
Other	0	0.00%
Interscan (4 servers)
Version	Number of Servers	Percent
3.5 (build 1294)	1	25.00%
3.8-Build_3013	1	25.00%
3.81-Build_1022	1	25.00%
3.8-Build_1080	1	25.00%
Other	0	0.00%
WebSTAR (2 servers)
Version	Number of Servers	Percent
Other	2	100.00%
NetIQ MailMarshal (2 servers)
Version	Number of Servers	Percent
6.0.3.8	1	50.00%
5.5.6.7	1	50.00%
Other	0	0.00%
MAILsweeper (1 servers)
Version	Number of Servers	Percent
4.3.20.0	1	100.00%
Other	0	0.00%