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	2,457,720	100.0%
Number of Servers that didn't respond	429,765	17.49%
Server didn't open socket	420,366	17.10%
Server didn't provide banner	9,399	0.38%
Server provided banner	2,027,955	82.51%
Server banner identifies software in use	1,142,769	46.50%

As indicated by the above table, of the 2,457,720 servers queried, only 1,142,769 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	593,674	51.95%
Postfix	345,804	30.26%
Sendmail	92,395	8.09%
Microsoft	40,885	3.58%
MailEnable	30,668	2.68%
MDaemon	18,931	1.66%
IMail	4,747	0.42%
Lotus Domino	2,888	0.25%
CommuniGate Pro	2,746	0.24%
WinWebMail	2,228	0.19%
XMail	1,709	0.15%
Qmail Toaster	1,368	0.12%
Kerio	976	0.09%
SurgeSMTP	925	0.08%
Merak	697	0.06%
ArGoSoft	419	0.04%
MagicMail	278	0.02%
Post.Office	270	0.02%
GroupWise	259	0.02%
Gordano Messaging Suite (GMS)	226	0.02%
Trend Micro	174	0.02%
OpenSMTPD	154	0.01%
InterScan VirusWall	82	0.01%
Mirapoint	71	0.01%
VisNetic	59	0.01%
Mercury	26	0.00%
Interscan	22	0.00%
WebSTAR V	21	0.00%
OpenVMS	20	0.00%
Neon Mail Server	14	0.00%
NetIQ MailMarshal	10	0.00%
ModusMail	10	0.00%
MessageWall	6	0.00%
WebSTAR	4	0.00%
MAILsweeper	3	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (593,674 servers)
Version	Number of Servers	Percent
4.82	437,047	73.62%
4.84	40,945	6.90%
4.80.1	23,755	4.00%
4.80	23,645	3.98%
4.76	19,487	3.28%
4.72	16,637	2.80%
4.69	9,825	1.65%
4.77	6,454	1.09%
Other	15,879	2.67%
Postfix (345,804 servers)
Version	Number of Servers	Percent
Other	345,804	100.00%
Sendmail (92,395 servers)
Version	Number of Servers	Percent
8.13.8	20,688	22.39%
8.14.5	18,841	20.39%
8.14.4	15,277	16.53%
8.13.1	11,963	12.95%
8.14.3	6,766	7.32%
8.12.11.20060308	2,408	2.61%
8.13.6.20060614	2,312	2.50%
8.14.7	1,843	1.99%
8.14.2	1,307	1.41%
8.11.6	1,116	1.21%
8.14.9	1,112	1.20%
8.12.10	1,058	1.15%
8.14.1	945	1.02%
Other	6,759	7.32%
Microsoft (40,885 servers)
Version	Number of Servers	Percent
6.0.3790.4675	31,585	77.25%
6.0.3790.3959	3,471	8.49%
7.5.7601.17514	2,302	5.63%
6.0.3790.1830	941	2.30%
7.0.6002.18264	459	1.12%
5.0.2195.7381	426	1.04%
Other	1,701	4.16%
MailEnable (30,668 servers)
Version	Number of Servers	Percent
1.986--	2,702	8.81%
6.5--	2,235	7.29%
5.10--	1,325	4.32%
8.04--	1,121	3.66%
8.51--	1,040	3.39%
4.26--	973	3.17%
6.0--	959	3.13%
8.00--	854	2.78%
7.06--	826	2.69%
8.50--	779	2.54%
7.07--	553	1.80%
1.981--	502	1.64%
7.50--	490	1.60%
6.57--	478	1.56%
7.0--	473	1.54%
7.53--	463	1.51%
6.70--	448	1.46%
8.53--	404	1.32%
8.55--	370	1.21%
8.55--8.55	358	1.17%
Other	13,315	43.42%
MDaemon (18,931 servers)
Version	Number of Servers	Percent
14.0.3	2,062	10.89%
14.5.0	1,674	8.84%
11.0.3	1,082	5.72%
14.0.2	952	5.03%
11.0.0	950	5.02%
13.0.4	864	4.56%
13.0.5	796	4.20%
13.5.1	774	4.09%
10.0.0	511	2.70%
12.5.6	480	2.54%
13.6.2	439	2.32%
10.1.2	383	2.02%
14.0.0	361	1.91%
10.1.1	351	1.85%
12.5.4	350	1.85%
13.6.0	349	1.84%
13.5.2	297	1.57%
10.1.0	279	1.47%
13.0.3	274	1.45%
9.6.1	266	1.41%
13.0.2	264	1.39%
9.6.6	254	1.34%
9.6.2	237	1.25%
13.6.1	231	1.22%
Other	4,451	23.51%
IMail (4,747 servers)
Version	Number of Servers	Percent
12.3.0.100	586	12.34%
8.22	544	11.46%
12.2.0.235	441	9.29%
9.23	298	6.28%
12.4.1.15	274	5.77%
12.4.2.27	257	5.41%
11.5	255	5.37%
8.15	247	5.20%
8.05	197	4.15%
12.4.0.166	141	2.97%
11.01	139	2.93%
11.03	138	2.91%
12.1.0.270	124	2.61%
12.4.1.9	105	2.21%
7.15	82	1.73%
11.02	82	1.73%
6.06	78	1.64%
10.02	75	1.58%
7.07	65	1.37%
8.00	56	1.18%
Other	563	11.86%
Lotus Domino (2,888 servers)
Version	Number of Servers	Percent
8.5.3	464	16.07%
8.5.3FP6	217	7.51%
8.5.2	155	5.37%
8.5.3FP3	136	4.71%
8.5.1	114	3.95%
7.0.2	109	3.77%
8.5.3FP2	108	3.74%
8.5.3FP4	100	3.46%
8.5.3FP5	94	3.25%
8.5.2FP2	80	2.77%
8.5.2FP3	80	2.77%
8.5	77	2.67%
8.5.3FP1	77	2.67%
8.5.2FP4	74	2.56%
7.0.3	57	1.97%
8.5.1FP5	50	1.73%
7.0	44	1.52%
8.0.1	42	1.45%
6.5.3	41	1.42%
7.0.1	39	1.35%
6.5.1	39	1.35%
8.5.2FP1	36	1.25%
8.0.2	36	1.25%
8.0	35	1.21%
6.5.4	34	1.18%
6.5	31	1.07%
Other	519	17.97%
CommuniGate Pro (2,746 servers)
Version	Number of Servers	Percent
6.0.9	314	11.43%
5.1.16	277	10.09%
6.0.10	138	5.03%
6.0.7	116	4.22%
6.0.8	113	4.12%
5.2.20	93	3.39%
5.4.11	84	3.06%
4.1.8	79	2.88%
6.0.5	74	2.69%
5.3.13	59	2.15%
5.0.14	56	2.04%
5.2.19	51	1.86%
4.2.10	48	1.75%
5.2.3	47	1.71%
5.1.12	42	1.53%
5.4.4	40	1.46%
5.3.15	39	1.42%
5.2.16	38	1.38%
5.4.1	36	1.31%
6.0.1	34	1.24%
5.4.6	34	1.24%
5.4.8	34	1.24%
5.4.10	33	1.20%
5.4.5	29	1.06%
Other	838	30.52%
WinWebMail (2,228 servers)
Version	Number of Servers	Percent
3.8.1.3	394	17.68%
3.8.0.1	205	9.20%
3.7.6.1	193	8.66%
3.9.0.1	174	7.81%
3.8.1.5	142	6.37%
3.9.0.7	134	6.01%
3.8.5.1	121	5.43%
3.8.6.1	119	5.34%
3.8.1.1	118	5.30%
3.7.3.1	118	5.30%
3.7.7.3	92	4.13%
3.7.1.1	67	3.01%
3.8.2.1	65	2.92%
3.8.3.1	41	1.84%
3.9.0.5	40	1.80%
3.7.5.1	38	1.71%
3.8.3.3	29	1.30%
3.6.3.1	24	1.08%
3.7.0.5	23	1.03%
Other	91	4.08%
XMail (1,709 servers)
Version	Number of Servers	Percent
1.27	597	34.93%
1.22	474	27.74%
1.25	226	13.22%
1.26	153	8.95%
1.24	90	5.27%
1.21	45	2.63%
1.23	27	1.58%
1.20	20	1.17%
Other	77	4.51%
Qmail Toaster (1,368 servers)
Version	Number of Servers	Percent
1.3	1,298	94.88%
1.2	31	2.27%
1.03.5	15	1.10%
Other	24	1.75%
Kerio (976 servers)
Version	Number of Servers	Percent
6.7.3	192	19.67%
6.7.0	100	10.25%
6.6.2	90	9.22%
6.5.2	71	7.27%
6.5.0	70	7.17%
6.7.2	63	6.45%
6.4.1	56	5.74%
6.7.1	43	4.41%
6.6.1	42	4.30%
6.3.1	42	4.30%
6.5.1	29	2.97%
6.4.0	26	2.66%
6.3.0	23	2.36%
6.4.2	21	2.15%
6.6.0	15	1.54%
6.1.3	11	1.13%
6.2.0	10	1.02%
Other	72	7.38%
SurgeSMTP (925 servers)
Version	Number of Servers	Percent
6.5a2-2	204	22.05%
6.7c-1	100	10.81%
6.5a-1	79	8.54%
6.3c2-2	64	6.92%
5.2a-1	38	4.11%
6.4a-1	37	4.00%
6.7b-13	33	3.57%
5.3h2-2	30	3.24%
3.9e-1	24	2.59%
6.1c-1	24	2.59%
6.7f-2	23	2.49%
3.8k4-4	21	2.27%
6.7a-1	16	1.73%
4.0u4-4	15	1.62%
6.0a5-5	13	1.41%
Other	204	22.05%
Merak (697 servers)
Version	Number of Servers	Percent
8.0.3	240	34.43%
8.9.1	94	13.49%
8.5.0	50	7.17%
8.3.8	40	5.74%
7.5.2	34	4.88%
7.4.5	33	4.73%
7.6.4	27	3.87%
7.6.1	15	2.15%
7.0.1	14	2.01%
7.2.0	11	1.58%
7.4.2	10	1.43%
8.9.0	10	1.43%
8.2.4	10	1.43%
9.0.0	10	1.43%
8.3.15	9	1.29%
6.2.1	7	1.00%
7.1.6	7	1.00%
Other	76	10.90%
ArGoSoft (419 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	108	25.78%
1.8 (1.8.9.3)	63	15.04%
1.8 (1.8.9.5)	57	13.60%
1.8 (1.8.9.1)	39	9.31%
1.8 (1.8.8.7)	24	5.73%
1.8 (1.8.8.8)	21	5.01%
1.8 (1.8.9.2)	16	3.82%
1.8 (1.8.6.0)	10	2.39%
1.8 (1.8.9.4)	10	2.39%
1.8 (1.8.7.3)	7	1.67%
1.8 (1.8.8.9)	6	1.43%
Other	58	13.84%
MagicMail (278 servers)
Version	Number of Servers	Percent
Other	278	100.00%
Post.Office (270 servers)
Version	Number of Servers	Percent
4.2.2	41	15.19%
3.5.3	38	14.07%
4.1.2.4	35	12.96%
4.1.0.2	15	5.56%
4.1.1	13	4.81%
4.0.1	11	4.07%
3.9.2.3	10	3.70%
3.5.3J	8	2.96%
4.1.0.3	8	2.96%
4.2.1.3	8	2.96%
3.1.2J	7	2.59%
4.2	6	2.22%
4.2.1.1	6	2.22%
4.1.2.3	5	1.85%
3.8.7.4	5	1.85%
3.1.2	4	1.48%
3.5.4	4	1.48%
4.1.0.4	4	1.48%
3.5.1	4	1.48%
3.9.2	3	1.11%
3.5.2	3	1.11%
3.9.1.2	3	1.11%
4.1.2.2	3	1.11%
3.9.1	3	1.11%
Other	23	8.52%
GroupWise (259 servers)
Version	Number of Servers	Percent
7.0.3	38	14.67%
8.0.2	29	11.20%
6.5.7	28	10.81%
8.0.3	24	9.27%
7.0.4	19	7.34%
12.0.2	15	5.79%
7.0.2	14	5.41%
14.0.0	12	4.63%
14.0.1	12	4.63%
6.5.4	11	4.25%
6.5.6	10	3.86%
7.0.1	6	2.32%
6.0.4	5	1.93%
12.0.1	4	1.54%
6.5.5	4	1.54%
6.5.2	3	1.16%
8.0.1	3	1.16%
8.0.0	3	1.16%
6.5.0	3	1.16%
12.0.3	3	1.16%
Other	13	5.02%
Gordano Messaging Suite (GMS) (226 servers)
Version	Number of Servers	Percent
Other	226	100.00%
Trend Micro (174 servers)
Version	Number of Servers	Percent
5.7	65	37.36%
5.5	37	21.26%
5.18	34	19.54%
7.0	14	8.05%
7.1	11	6.32%
8.5	4	2.30%
3.53	3	1.72%
Other	6	3.45%
OpenSMTPD (154 servers)
Version	Number of Servers	Percent
Other	154	100.00%
InterScan VirusWall (82 servers)
Version	Number of Servers	Percent
Other	82	100.00%
Mirapoint (71 servers)
Version	Number of Servers	Percent
4.3.5-GA	11	15.49%
4.4.3-GA	7	9.86%
4.4.2a-FCS	5	7.04%
4.3.6-GA	5	7.04%
4.4.5-GA	4	5.63%
4.1.10-GA	4	5.63%
3.10.10a-GA	3	4.23%
3.8.5-GA	3	4.23%
4.4.4-GA	3	4.23%
4.3.7-GA	3	4.23%
4.1.9-GA	2	2.82%
4.3.3-GA	2	2.82%
4.4.4b-GA	2	2.82%
4.1.5-GA	2	2.82%
3.10.7-GA	2	2.82%
4.1.3-GA	1	1.41%
3.4.6-GR	1	1.41%
3.10.4-GA	1	1.41%
4.2.4-GA	1	1.41%
4.1.6-GA	1	1.41%
3.7.5a-GA	1	1.41%
4.2.3-GA	1	1.41%
4.4.5a-GA	1	1.41%
3.8.7a	1	1.41%
3.7.3a-GA	1	1.41%
3.8.4-GA	1	1.41%
3.10.2-GA	1	1.41%
4.1.8-GA	1	1.41%
Other	0	0.00%
VisNetic (59 servers)
Version	Number of Servers	Percent
9.3.2.0	14	23.73%
9.1.4.1	6	10.17%
6.2.2.0	4	6.78%
7.2.4.1	4	6.78%
8.5.0.8	4	6.78%
8.0.3.1	3	5.08%
5.8.6.6	3	5.08%
5.5.8.3	3	5.08%
8.0.3	2	3.39%
5.0.2.3	2	3.39%
9.1.4.0	2	3.39%
7.6.1.0	2	3.39%
5.3.5.0	2	3.39%
8.3.5.0	1	1.69%
8.3.0.1	1	1.69%
8.5.0.5	1	1.69%
5.4.5.4	1	1.69%
8.0.3.0	1	1.69%
5.4.5	1	1.69%
5.0.2.0	1	1.69%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	1.69%
Other	0	0.00%
Mercury (26 servers)
Version	Number of Servers	Percent
3.32	12	46.15%
1.48	12	46.15%
3.21	1	3.85%
4.x	1	3.85%
Other	0	0.00%
Interscan (22 servers)
Version	Number of Servers	Percent
3.81-Build_1022	5	22.73%
3.81-Build_1084	3	13.64%
3.55 (build 1016)	3	13.64%
3.55 (build 1029)	3	13.64%
3.53 (build 1493)	2	9.09%
3.5 (build 1294)	1	4.55%
3.8-Build_3013	1	4.55%
3.55 (build 1020)	1	4.55%
3.53 (build 2013)	1	4.55%
3.53 (build 2017)	1	4.55%
3.8-Build_1080	1	4.55%
Other	0	0.00%
WebSTAR V (21 servers)
Version	Number of Servers	Percent
5.4.1	9	42.86%
5.4.0	7	33.33%
5.3.4	3	14.29%
5.3.3	1	4.76%
5.3.2	1	4.76%
Other	0	0.00%
OpenVMS (20 servers)
Version	Number of Servers	Percent
7.3	7	35.00%
8.3	7	35.00%
8.4	5	25.00%
8.2	1	5.00%
Other	0	0.00%
Neon Mail Server (14 servers)
Version	Number of Servers	Percent
3.0.7	4	28.57%
3.1.4	3	21.43%
3.1.2	2	14.29%
3.1.0	2	14.29%
3.1.3	1	7.14%
3.0.6	1	7.14%
3.0.9	1	7.14%
Other	0	0.00%
NetIQ MailMarshal (10 servers)
Version	Number of Servers	Percent
6.0.3.8	5	50.00%
5.5.6.5	2	20.00%
5.5.5.6	1	10.00%
5.5.4.17	1	10.00%
5.5.6.7	1	10.00%
Other	0	0.00%
ModusMail (10 servers)
Version	Number of Servers	Percent
4.35.477.0	6	60.00%
4.1.361.21	1	10.00%
3.2.315.0	1	10.00%
4.35.477.8	1	10.00%
3.1.302.0	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%
WebSTAR (4 servers)
Version	Number of Servers	Percent
Other	4	100.00%
MAILsweeper (3 servers)
Version	Number of Servers	Percent
4.3.17.0	1	33.33%
4.3.19.0	1	33.33%
4.3.20.0	1	33.33%
Other	0	0.00%