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	2,189,222	100.0%
Number of Servers that didn't respond	380,486	17.38%
Server didn't open socket	372,442	17.01%
Server didn't provide banner	8,044	0.37%
Server provided banner	1,808,736	82.62%
Server banner identifies software in use	1,083,786	49.51%

As indicated by the above table, of the 2,189,222 servers queried, only 1,083,786 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	596,758	55.06%
Postfix	349,960	32.29%
Sendmail	63,922	5.90%
MailEnable	26,582	2.45%
Microsoft	17,598	1.62%
MDaemon	15,244	1.41%
IMail	2,970	0.27%
CommuniGate Pro	2,077	0.19%
Lotus Domino	1,587	0.15%
WinWebMail	1,429	0.13%
XMail	1,283	0.12%
Qmail Toaster	998	0.09%
SurgeSMTP	763	0.07%
Kerio	638	0.06%
Merak	399	0.04%
ArGoSoft	281	0.03%
OpenSMTPD	255	0.02%
MagicMail	230	0.02%
Post.Office	197	0.02%
GroupWise	162	0.01%
Gordano Messaging Suite (GMS)	159	0.01%
Trend Micro	97	0.01%
InterScan VirusWall	52	0.00%
Mirapoint	37	0.00%
VisNetic	33	0.00%
OpenVMS	15	0.00%
Mercury	13	0.00%
ModusMail	11	0.00%
WebSTAR V	10	0.00%
Interscan	9	0.00%
Neon Mail Server	7	0.00%
MessageWall	5	0.00%
NetIQ MailMarshal	3	0.00%
WebSTAR	1	0.00%
MAILsweeper	1	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (596,758 servers)
Version	Number of Servers	Percent
4.87	278,854	46.73%
4.86	192,146	32.20%
4.85	28,576	4.79%
4.84	15,599	2.61%
4.80	14,963	2.51%
4.72	14,145	2.37%
4.76	10,971	1.84%
4.82	9,889	1.66%
4.80.1	8,956	1.50%
4.86.2	6,217	1.04%
Other	16,442	2.76%
Postfix (349,960 servers)
Version	Number of Servers	Percent
Other	349,960	100.00%
Sendmail (63,922 servers)
Version	Number of Servers	Percent
8.14.5	14,455	22.61%
8.14.4	13,026	20.38%
8.13.8	12,426	19.44%
8.13.1	7,460	11.67%
8.14.3	3,728	5.83%
8.14.9	1,877	2.94%
8.14.7	1,444	2.26%
8.15.2	1,430	2.24%
8.12.11.20060308	1,272	1.99%
8.14.2	717	1.12%
Other	6,087	9.52%
MailEnable (26,582 servers)
Version	Number of Servers	Percent
8.60--	2,166	8.15%
9.00--	2,055	7.73%
6.5--	1,478	5.56%
8.53--	1,456	5.48%
1.986--	1,229	4.62%
8.51--	1,004	3.78%
8.04--	744	2.80%
5.10--	654	2.46%
8.50--	606	2.28%
8.60-8.60-	606	2.28%
8.00--	504	1.90%
4.26--	484	1.82%
7.06--	440	1.66%
6.0--	433	1.63%
7.0--	321	1.21%
7.07--	291	1.09%
7.50--	282	1.06%
9.12--9.12	278	1.05%
8.55--	273	1.03%
Other	11,278	42.43%
Microsoft (17,598 servers)
Version	Number of Servers	Percent
6.0.3790.4675	12,122	68.88%
7.5.7601.17514	1,536	8.73%
6.0.3790.3959	1,418	8.06%
8.5.9600.16384	595	3.38%
6.0.3790.1830	357	2.03%
7.0.6002.18264	306	1.74%
8.0.9200.16384	247	1.40%
5.0.2195.7381	199	1.13%
5.0.2195.5329	190	1.08%
Other	628	3.57%
MDaemon (15,244 servers)
Version	Number of Servers	Percent
16.0.1	1,521	9.98%
15.5.3	1,066	6.99%
16.0.2	809	5.31%
15.0.3	755	4.95%
13.5.1	684	4.49%
11.0.3	681	4.47%
11.0.0	633	4.15%
13.0.4	590	3.87%
13.0.5	583	3.82%
15.5.2	402	2.64%
13.6.3	360	2.36%
12.5.6	329	2.16%
16.0.0	309	2.03%
12.5.4	292	1.92%
10.0.0	289	1.90%
10.1.2	249	1.63%
14.5.2	243	1.59%
15.5.1	240	1.57%
10.1.1	179	1.17%
10.1.0	178	1.17%
14.0.3	177	1.16%
9.6.1	156	1.02%
9.6.6	153	1.00%
14.5.3	153	1.00%
Other	4,213	27.64%
IMail (2,970 servers)
Version	Number of Servers	Percent
12.5.4.146	468	15.76%
12.5.3.93	284	9.56%
8.22	281	9.46%
12.4.1.15	224	7.54%
9.23	205	6.90%
8.15	159	5.35%
12.3.0.100	156	5.25%
8.05	132	4.44%
11.03	86	2.90%
11.5	81	2.73%
12.2.0.235	59	1.99%
12.5.3.99	57	1.92%
12.5.1.60	55	1.85%
7.07	50	1.68%
11.02	48	1.62%
12.5.2.62	47	1.58%
12.4.1.9	44	1.48%
7.15	40	1.35%
10.02	38	1.28%
11.01	32	1.08%
12.1.0.270	30	1.01%
6.06	30	1.01%
Other	364	12.26%
CommuniGate Pro (2,077 servers)
Version	Number of Servers	Percent
5.1.16	217	10.45%
6.1.10	98	4.72%
6.1.8	94	4.53%
6.0.11	92	4.43%
6.1.9	80	3.85%
6.0.9	79	3.80%
5.4.11	73	3.51%
5.2.20	69	3.32%
6.1.5	65	3.13%
6.1.7	64	3.08%
6.1.2	53	2.55%
6.0.10	46	2.21%
6.1.6	45	2.17%
5.3.13	44	2.12%
5.0.14	42	2.02%
5.3.15	40	1.93%
5.2.3	38	1.83%
4.1.8	37	1.78%
6.0.7	33	1.59%
6.1.4	29	1.40%
5.2.16	28	1.35%
5.4.8	25	1.20%
5.4.6	21	1.01%
5.1.12	21	1.01%
Other	644	31.01%
Lotus Domino (1,587 servers)
Version	Number of Servers	Percent
8.5.3FP6	253	15.94%
8.5.3	225	14.18%
8.5.2	73	4.60%
8.5.1	63	3.97%
7.0.2	57	3.59%
8.5	49	3.09%
8.5.3FP2	48	3.02%
8.5.3FP3	44	2.77%
8.5.2FP3	41	2.58%
8.5.3FP4	38	2.39%
8.5.2FP4	38	2.39%
8.5.3FP5	33	2.08%
8.5.3FP1	32	2.02%
7.0.3	29	1.83%
8.5.2FP2	29	1.83%
7.0	27	1.70%
8.0.1	27	1.70%
6.5.1	25	1.58%
7.0.1	24	1.51%
8.5.1FP5	23	1.45%
8.0	23	1.45%
6.5.4	20	1.26%
6.5	19	1.20%
8.5.2FP1	19	1.20%
6.5.3	18	1.13%
8.0.2	16	1.01%
Other	294	18.53%
WinWebMail (1,429 servers)
Version	Number of Servers	Percent
3.9.0.7	308	21.55%
3.8.1.3	242	16.93%
3.7.6.1	111	7.77%
3.9.0.1	103	7.21%
3.8.0.1	100	7.00%
3.8.1.5	76	5.32%
3.7.3.1	63	4.41%
3.8.1.1	58	4.06%
3.8.5.1	56	3.92%
3.7.7.3	53	3.71%
3.8.6.1	46	3.22%
3.7.1.1	37	2.59%
3.8.2.1	35	2.45%
3.8.3.1	22	1.54%
3.7.5.1	21	1.47%
3.8.3.3	17	1.19%
3.7.0.5	16	1.12%
Other	65	4.55%
XMail (1,283 servers)
Version	Number of Servers	Percent
1.27	536	41.78%
1.22	354	27.59%
1.25	137	10.68%
1.26	106	8.26%
1.24	56	4.36%
1.21	29	2.26%
1.23	15	1.17%
1.20	13	1.01%
Other	37	2.88%
Qmail Toaster (998 servers)
Version	Number of Servers	Percent
1.3	929	93.09%
1.2	15	1.50%
1.03	15	1.50%
1.03.5	13	1.30%
Other	26	2.61%
SurgeSMTP (763 servers)
Version	Number of Servers	Percent
7.1e-1	221	28.96%
6.5a2-2	74	9.70%
6.9c-1	63	8.26%
6.7c-1	43	5.64%
7.0c2-2	42	5.50%
6.5a-1	30	3.93%
6.3c2-2	23	3.01%
3.9e-1	21	2.75%
6.4a-1	18	2.36%
5.2a-1	17	2.23%
6.1c-1	16	2.10%
7.1f-46	13	1.70%
3.8k4-4	13	1.70%
5.3h2-2	11	1.44%
7.1f-32	9	1.18%
4.0u4-4	9	1.18%
7.1f-9	9	1.18%
Other	131	17.17%
Kerio (638 servers)
Version	Number of Servers	Percent
6.7.3	141	22.10%
6.7.0	69	10.82%
6.6.2	51	7.99%
6.5.2	50	7.84%
6.5.0	41	6.43%
6.7.2	38	5.96%
6.6.1	29	4.55%
6.4.1	29	4.55%
6.7.1	25	3.92%
6.3.1	25	3.92%
6.5.1	22	3.45%
6.4.0	18	2.82%
6.3.0	16	2.51%
6.6.0	13	2.04%
6.1.3	9	1.41%
6.4.2	7	1.10%
6.2.0	7	1.10%
Other	48	7.52%
Merak (399 servers)
Version	Number of Servers	Percent
8.0.3	131	32.83%
8.9.1	60	15.04%
8.5.0	28	7.02%
8.3.8	21	5.26%
7.5.2	19	4.76%
7.4.5	19	4.76%
7.6.4	16	4.01%
7.6.1	12	3.01%
8.3.15	10	2.51%
7.0.1	9	2.26%
7.2.0	7	1.75%
7.4.2	5	1.25%
6.1.0	5	1.25%
8.9.0	5	1.25%
6.0.8	4	1.00%
Other	48	12.03%
ArGoSoft (281 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	88	31.32%
1.8 (1.8.9.5)	38	13.52%
1.8 (1.8.9.1)	31	11.03%
1.8 (1.8.9.3)	30	10.68%
1.8 (1.8.8.8)	13	4.63%
1.8 (1.8.8.7)	13	4.63%
1.8 (1.8.9.2)	7	2.49%
1.8 (1.8.7.3)	6	2.14%
1.8 (1.8.9.4)	6	2.14%
1.8 (1.8.6.0)	6	2.14%
1.8 (1.8.8.9)	4	1.42%
1.8 (1.8.7.6)	3	1.07%
1.8 (1.8.9.0)	3	1.07%
1.8 (1.8.8.4)	3	1.07%
1.8 (1.8.5.9)	3	1.07%
Other	27	9.61%
OpenSMTPD (255 servers)
Version	Number of Servers	Percent
Other	255	100.00%
MagicMail (230 servers)
Version	Number of Servers	Percent
Other	230	100.00%
Post.Office (197 servers)
Version	Number of Servers	Percent
4.2.2	44	22.34%
3.5.3	26	13.20%
4.3	23	11.68%
4.1.2.4	23	11.68%
4.2.1.3	9	4.57%
3.1.2J	6	3.05%
4.2.1.1	6	3.05%
4.0.1	5	2.54%
4.1.1	5	2.54%
3.9.2.3	5	2.54%
4.2	4	2.03%
4.1.0.2	4	2.03%
3.5.3J	3	1.52%
3.9.2	3	1.52%
4.1.2.3	3	1.52%
3.8.7.4	3	1.52%
3.1.2	3	1.52%
3.5.1	3	1.52%
3.5.4	2	1.02%
3.6.2	2	1.02%
4.1.0.3	2	1.02%
3.9.1.2	2	1.02%
4.1.2.2	2	1.02%
Other	9	4.57%
GroupWise (162 servers)
Version	Number of Servers	Percent
14.2.0	37	22.84%
14.0.1	16	9.88%
8.0.3	14	8.64%
7.0.3	12	7.41%
6.5.7	11	6.79%
14.0.0	10	6.17%
8.0.2	8	4.94%
14.0.2	7	4.32%
7.0.2	6	3.70%
7.0.4	5	3.09%
7.0.1	4	2.47%
6.0.4	4	2.47%
6.5.6	3	1.85%
12.0.3	3	1.85%
8.0.1	2	1.23%
12.0.4	2	1.23%
6.0.3	2	1.23%
8.0.0	2	1.23%
12.0.1	2	1.23%
6.5.4	2	1.23%
6.5.5	2	1.23%
12.0.0	2	1.23%
6.0.2	2	1.23%
Other	4	2.47%
Gordano Messaging Suite (GMS) (159 servers)
Version	Number of Servers	Percent
Other	159	100.00%
Trend Micro (97 servers)
Version	Number of Servers	Percent
5.7	37	38.14%
5.5	19	19.59%
5.18	17	17.53%
7.0	11	11.34%
7.1	3	3.09%
8.5	3	3.09%
3.53	2	2.06%
7.5	2	2.06%
7.1.	1	1.03%
8.5.2	1	1.03%
8	1	1.03%
Other	0	0.00%
InterScan VirusWall (52 servers)
Version	Number of Servers	Percent
Other	52	100.00%
Mirapoint (37 servers)
Version	Number of Servers	Percent
4.4.3-GA	7	18.92%
4.3.5-GA	4	10.81%
4.4.5-GA	4	10.81%
4.4.2a-FCS	3	8.11%
4.3.6-GA	3	8.11%
4.3.3-GA	2	5.41%
3.10.10a-GA	2	5.41%
4.4.4-GA	2	5.41%
4.4.7-GA	2	5.41%
4.1.10-GA	2	5.41%
4.1.9-GA	1	2.70%
4.4.5a-GA	1	2.70%
3.7.5a-GA	1	2.70%
3.8.4-GA	1	2.70%
3.10.2-GA	1	2.70%
4.4.6-GA	1	2.70%
Other	0	0.00%
VisNetic (33 servers)
Version	Number of Servers	Percent
9.3.2.0	8	24.24%
9.1.4.1	4	12.12%
6.2.2.0	3	9.09%
5.0.2.3	3	9.09%
5.5.8.3	2	6.06%
8.5.0.8	2	6.06%
8.0.3	1	3.03%
8.3.0.1	1	3.03%
5.8.6.6	1	3.03%
8.5.0.5	1	3.03%
8.0.3.1	1	3.03%
9.1.4.0	1	3.03%
7.6.1.0	1	3.03%
5.0.2.0	1	3.03%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	3.03%
5.3.5.0	1	3.03%
7.2.4.1	1	3.03%
Other	0	0.00%
OpenVMS (15 servers)
Version	Number of Servers	Percent
8.4	5	33.33%
8.3	5	33.33%
7.3	5	33.33%
Other	0	0.00%
Mercury (13 servers)
Version	Number of Servers	Percent
3.32	7	53.85%
1.48	4	30.77%
3.21	1	7.69%
4.x	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%
WebSTAR V (10 servers)
Version	Number of Servers	Percent
5.4.1	6	60.00%
5.4.0	3	30.00%
5.3.2	1	10.00%
Other	0	0.00%
Interscan (9 servers)
Version	Number of Servers	Percent
3.81-Build_1084	2	22.22%
3.55 (build 1029)	2	22.22%
3.5 (build 1294)	1	11.11%
3.8-Build_3013	1	11.11%
3.81-Build_1022	1	11.11%
3.8-Build_1080	1	11.11%
3.55 (build 1016)	1	11.11%
Other	0	0.00%
Neon Mail Server (7 servers)
Version	Number of Servers	Percent
3.1.2	2	28.57%
3.0.7	2	28.57%
3.1.0	2	28.57%
3.1.4	1	14.29%
Other	0	0.00%
MessageWall (5 servers)
Version	Number of Servers	Percent
1.0.8	5	100.00%
Other	0	0.00%
NetIQ MailMarshal (3 servers)
Version	Number of Servers	Percent
5.5.6.5	1	33.33%
5.5.6.7	1	33.33%
6.0.3.8	1	33.33%
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%