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	2,217,426	100.0%
Number of Servers that didn't respond	398,355	17.96%
Server didn't open socket	385,987	17.41%
Server didn't provide banner	12,368	0.56%
Server provided banner	1,819,071	82.04%
Server banner identifies software in use	986,130	44.47%

As indicated by the above table, of the 2,217,426 servers queried, only 986,130 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	379,604	38.49%
Postfix	221,241	22.44%
Microsoft	150,599	15.27%
Sendmail	140,668	14.26%
MailEnable	31,493	3.19%
MDaemon	21,770	2.21%
IMail	11,226	1.14%
Lotus Domino	5,100	0.52%
WinWebMail	4,594	0.47%
CommuniGate Pro	3,606	0.37%
Kerio	3,009	0.31%
XMail	2,491	0.25%
Merak	2,071	0.21%
Qmail Toaster	1,706	0.17%
SurgeSMTP	1,285	0.13%
ArGoSoft	1,229	0.12%
GroupWise	1,076	0.11%
Trend Micro	670	0.07%
Post.Office	511	0.05%
Gordano Messaging Suite (GMS)	496	0.05%
MagicMail	395	0.04%
Mirapoint	294	0.03%
VisNetic	249	0.03%
InterScan VirusWall	233	0.02%
NetIQ MailMarshal	110	0.01%
Interscan	98	0.01%
Mercury	81	0.01%
WebSTAR V	57	0.01%
Neon Mail Server	49	0.00%
MessageWall	26	0.00%
WebSTAR	25	0.00%
OpenVMS	25	0.00%
ModusMail	24	0.00%
MAILsweeper	12	0.00%
OpenSMTPD	7	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (379,604 servers)
Version	Number of Servers	Percent
4.69	320,761	84.50%
4.72	16,729	4.41%
4.67	12,099	3.19%
4.63	9,106	2.40%
4.71	4,679	1.23%
4.74	4,324	1.14%
Other	11,906	3.14%
Postfix (221,241 servers)
Version	Number of Servers	Percent
Other	221,241	100.00%
Microsoft (150,599 servers)
Version	Number of Servers	Percent
6.0.3790.4675	108,449	72.01%
6.0.3790.3959	27,897	18.52%
6.0.3790.1830	7,318	4.86%
5.0.2195.7381	2,171	1.44%
5.0.2195.6713	1,543	1.02%
Other	3,221	2.14%
Sendmail (140,668 servers)
Version	Number of Servers	Percent
8.13.8	29,639	21.07%
8.13.1	26,432	18.79%
8.14.3	19,362	13.76%
8.14.4	17,240	12.26%
8.12.11.20060308	6,818	4.85%
8.13.6.20060614	5,325	3.79%
8.14.2	4,303	3.06%
8.12.10	3,978	2.83%
8.11.6	3,943	2.80%
8.13.6	3,276	2.33%
8.14.1	3,130	2.23%
8.12.11.20060614	2,985	2.12%
8.12.11	2,343	1.67%
8.13.7	2,223	1.58%
8.13.4	2,177	1.55%
8.12.8	1,910	1.36%
Other	5,584	3.97%
MailEnable (31,493 servers)
Version	Number of Servers	Percent
1.986--	10,411	33.06%
1.981--	2,519	8.00%
1.983--	1,597	5.07%
4.26--	1,306	4.15%
3.62--	1,089	3.46%
0-3.63-	933	2.96%
4.23--	748	2.38%
4.22--	675	2.14%
0-4.26-	621	1.97%
1.96--	471	1.50%
1.95--	438	1.39%
0-2.53-	435	1.38%
0-1.87-	406	1.29%
--3.63	378	1.20%
4.14--	346	1.10%
1.9--	331	1.05%
0-4.23-	328	1.04%
Other	8,461	26.87%
MDaemon (21,770 servers)
Version	Number of Servers	Percent
11.0.3	5,450	25.03%
12.0.0	1,663	7.64%
10.1.2	1,321	6.07%
10.0.0	1,139	5.23%
11.0.0	1,101	5.06%
10.1.1	931	4.28%
9.6.1	703	3.23%
9.6.6	700	3.22%
10.1.0	553	2.54%
9.6.5	474	2.18%
9.5.2	467	2.15%
10.0.5	464	2.13%
10.0.2	414	1.90%
9.5.1	371	1.70%
11.0.2	371	1.70%
10.0.4	362	1.66%
9.5.6	356	1.64%
9.6.4	356	1.64%
9.6.2	355	1.63%
8.1.3	337	1.55%
9.0.4	314	1.44%
11.0.1	275	1.26%
9.6.3	225	1.03%
6.8.5	219	1.01%
Other	2,849	13.09%
IMail (11,226 servers)
Version	Number of Servers	Percent
8.22	2,206	19.65%
11.02	985	8.77%
8.15	868	7.73%
11.03	836	7.45%
9.23	752	6.70%
11.01	625	5.57%
8.05	490	4.36%
9.20	478	4.26%
9.10	461	4.11%
11.0	398	3.55%
10.02	386	3.44%
9.21	308	2.74%
7.07	306	2.73%
7.15	269	2.40%
6.06	228	2.03%
8.00	210	1.87%
8.04	158	1.41%
10.01	153	1.36%
Other	1,109	9.88%
Lotus Domino (5,100 servers)
Version	Number of Servers	Percent
8.5.2	594	11.65%
8.5.1	440	8.63%
8.5.2FP1	357	7.00%
8.5	320	6.27%
7.0.2	311	6.10%
7.0.3	183	3.59%
7.0.1	162	3.18%
8.0.2	161	3.16%
8.5.1FP3	153	3.00%
8.0.1	152	2.98%
6.5.1	138	2.71%
6.5.4	134	2.63%
6.5.3	115	2.25%
8.5.1FP2	109	2.14%
8.0	105	2.06%
7.0	102	2.00%
7.0.3FP1	97	1.90%
6.5.5	95	1.86%
8.5.1FP4	93	1.82%
7.0.2FP2	88	1.73%
8.5.1FP5	85	1.67%
6.5	71	1.39%
8.5.1FP1	66	1.29%
8.5FP1	60	1.18%
5.0.11	54	1.06%
Other	855	16.76%
WinWebMail (4,594 servers)
Version	Number of Servers	Percent
3.8.0.1	995	21.66%
3.7.6.1	689	15.00%
3.8.1.3	544	11.84%
3.7.7.3	512	11.14%
3.7.3.1	504	10.97%
3.8.1.1	422	9.19%
3.7.1.1	233	5.07%
3.7.5.1	156	3.40%
3.7.7.1	123	2.68%
3.6.3.1	118	2.57%
3.7.0.5	106	2.31%
3.7.0.3	95	2.07%
3.7.0.7	68	1.48%
Other	29	0.63%
CommuniGate Pro (3,606 servers)
Version	Number of Servers	Percent
5.1.16	252	6.99%
4.1.8	201	5.57%
5.3.12	156	4.33%
5.2.16	143	3.97%
5.3.8	130	3.61%
5.3.10	125	3.47%
4.2.10	115	3.19%
5.3.11	110	3.05%
5.2.20	100	2.77%
5.2.19	93	2.58%
5.1.12	85	2.36%
5.3.9	81	2.25%
5.0.14	77	2.14%
5.2.3	76	2.11%
5.4	75	2.08%
5.2.12	69	1.91%
5.2.14	68	1.89%
5.1.13	64	1.77%
5.3.7	60	1.66%
5.2.8	57	1.58%
5.2.13	54	1.50%
5.3.5	54	1.50%
5.3.2	51	1.41%
5.2.10	48	1.33%
5.2.18	46	1.28%
5.1.14	40	1.11%
5.2.0	39	1.08%
Other	1,137	31.53%
Kerio (3,009 servers)
Version	Number of Servers	Percent
6.7.3	403	13.39%
6.6.2	340	11.30%
6.7.0	300	9.97%
6.7.2	231	7.68%
6.5.0	208	6.91%
6.5.2	176	5.85%
6.3.1	163	5.42%
6.4.1	151	5.02%
6.7.1	144	4.79%
6.6.0	112	3.72%
6.4.0	108	3.59%
6.5.1	103	3.42%
6.6.1	78	2.59%
6.4.2	77	2.56%
6.3.0	66	2.19%
6.1.3	36	1.20%
6.2.2	31	1.03%
Other	282	9.37%
XMail (2,491 servers)
Version	Number of Servers	Percent
1.22	582	23.36%
1.25	563	22.60%
1.26	310	12.44%
1.27	306	12.28%
1.24	281	11.28%
1.21	111	4.46%
1.23	70	2.81%
1.20	60	2.41%
1.17	49	1.97%
1.12	47	1.89%
Other	112	4.50%
Merak (2,071 servers)
Version	Number of Servers	Percent
8.0.3	835	40.32%
8.9.1	201	9.71%
8.5.0	143	6.90%
7.5.2	96	4.64%
7.4.5	93	4.49%
7.6.4	86	4.15%
8.3.8	82	3.96%
8.2.13	46	2.22%
9.0.0	31	1.50%
7.4.2	31	1.50%
7.6.1	28	1.35%
7.2.0	27	1.30%
8.3.15	27	1.30%
8.9.0	26	1.26%
8.2.4	24	1.16%
7.0.1	23	1.11%
Other	272	13.13%
Qmail Toaster (1,706 servers)
Version	Number of Servers	Percent
1.3	1,575	92.32%
1.2	97	5.69%
1.0	24	1.41%
Other	10	0.59%
SurgeSMTP (1,285 servers)
Version	Number of Servers	Percent
5.2a-1	294	22.88%
3.9e-1	117	9.11%
4.2d4-4	102	7.94%
5.0e4-4	76	5.91%
3.8k4-4	57	4.44%
4.0u4-4	48	3.74%
5.1c2-2	37	2.88%
4.2d2-2	34	2.65%
5.0e3-3	32	2.49%
4.3e-1	31	2.41%
4.3g2-2	30	2.33%
4.3g4-4	28	2.18%
5.2c-1	26	2.02%
5.1c-1	26	2.02%
3.8f3-3	24	1.87%
3.7b8-8	24	1.87%
3.8i3-3	24	1.87%
4.2a3-3	22	1.71%
3.6f5-5	20	1.56%
3.9g2-2	15	1.17%
3.9h-18	15	1.17%
3.9c-1	14	1.09%
Other	189	14.71%
ArGoSoft (1,229 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	245	19.93%
1.8 (1.8.9.5)	202	16.44%
1.8 (1.8.9.3)	158	12.86%
1.8 (1.8.9.1)	114	9.28%
1.8 (1.8.8.8)	100	8.14%
1.8 (1.8.8.7)	75	6.10%
1.8 (1.8.9.2)	54	4.39%
1.8 (1.8.9.4)	36	2.93%
1.8 (1.8.8.1)	22	1.79%
1.8 (1.8.8.9)	21	1.71%
1.8 (1.8.9.0)	17	1.38%
1.8 (1.8.6.0)	17	1.38%
1.8 (1.8.8.2)	13	1.06%
Other	155	12.61%
GroupWise (1,076 servers)
Version	Number of Servers	Percent
7.0.3	268	24.91%
8.0.2	157	14.59%
6.5.7	118	10.97%
7.0.2	105	9.76%
8.0.1	78	7.25%
7.0.1	52	4.83%
6.5.4	49	4.55%
7.0.4	46	4.28%
6.5.6	40	3.72%
6.5.1	32	2.97%
6.0.4	30	2.79%
8.0.0	25	2.32%
6.5.5	16	1.49%
7.0	14	1.30%
Other	46	4.28%
Trend Micro (670 servers)
Version	Number of Servers	Percent
5.7	277	41.34%
5.5	178	26.57%
5.18	121	18.06%
7.0	58	8.66%
7.1	16	2.39%
7	8	1.19%
Other	12	1.79%
Post.Office (511 servers)
Version	Number of Servers	Percent
3.5.3	79	15.46%
4.1.0.2	60	11.74%
4.0.1	43	8.41%
3.5.3J	26	5.09%
4.1.1	22	4.31%
3.8.3	22	4.31%
4.1.2.4	20	3.91%
3.9.2.3	14	2.74%
3.9.2	14	2.74%
3.1.2J	13	2.54%
3.9.1	12	2.35%
3.1.2	11	2.15%
3.6.3	11	2.15%
3.8.7.4	11	2.15%
4.1.0.3	10	1.96%
4.0.1.1	10	1.96%
4.1.0.4	10	1.96%
3.6.2	10	1.96%
4.1.2.2	10	1.96%
4.1	9	1.76%
4.0.0.2	9	1.76%
3.9.2.1	8	1.57%
4.0.0.1	7	1.37%
3.9.0	6	1.17%
3.9.1.2	6	1.17%
4.1.2.3	6	1.17%
3.5.2	6	1.17%
Other	46	9.00%
Gordano Messaging Suite (GMS) (496 servers)
Version	Number of Servers	Percent
Other	496	100.00%
MagicMail (395 servers)
Version	Number of Servers	Percent
Other	395	100.00%
Mirapoint (294 servers)
Version	Number of Servers	Percent
3.8.4-GA	28	9.52%
3.10.5-GA	27	9.18%
3.10.8-GA	22	7.48%
3.10.10a-GA	22	7.48%
3.8.3-GA	19	6.46%
4.1.9-GA	16	5.44%
3.10.7-GA	15	5.10%
3.10.9-GA	15	5.10%
4.1.3-GA	14	4.76%
4.1.10-GA	13	4.42%
3.10.4-GA	11	3.74%
4.1.8-GA	10	3.40%
3.10.6-GA	9	3.06%
3.10.3-GA	8	2.72%
4.2.3-GA	8	2.72%
3.8.5-GA	7	2.38%
4.1.4-GA	7	2.38%
3.8.7a	6	2.04%
3.8.2-GA	5	1.70%
3.8.6-GA	5	1.70%
4.0.5a	4	1.36%
3.7.3a-GA	4	1.36%
3.7.5a-GA	3	1.02%
4.1.5-GA	3	1.02%
Other	13	4.42%
VisNetic (249 servers)
Version	Number of Servers	Percent
9.3.2.0	88	35.34%
9.1.4.1	36	14.46%
5.8.6.6	14	5.62%
8.5.0.8	13	5.22%
5.5.8.3	10	4.02%
8.0.3.1	8	3.21%
8.0.3	7	2.81%
7.6.1.0	7	2.81%
8.3.5.0	6	2.41%
6.2.2.0	6	2.41%
8.0.3.0	6	2.41%
5.3.5.0	5	2.01%
5.0.2.1	4	1.61%
9.1.4.0	4	1.61%
5.0.2.3	4	1.61%
7.2.4.1	4	1.61%
8.3.6	3	1.20%
7.5.3.0	3	1.20%
7.2.4.0	3	1.20%
5.4.5.4	3	1.20%
Other	15	6.02%
InterScan VirusWall (233 servers)
Version	Number of Servers	Percent
Other	233	100.00%
NetIQ MailMarshal (110 servers)
Version	Number of Servers	Percent
6.0.3.8	75	68.18%
5.5.6.7	9	8.18%
6.1.3.15	8	7.27%
5.5.4.16	5	4.55%
5.5.6.6	3	2.73%
5.5.3.17	2	1.82%
5.5.6.5	2	1.82%
Other	6	5.45%
Interscan (98 servers)
Version	Number of Servers	Percent
3.81-Build_1022	15	15.31%
3.55 (build 1016)	14	14.29%
3.55 (build 1029)	12	12.24%
3.53 (build 2017)	10	10.20%
3.8-Build_3013	7	7.14%
3.81-Build_1084	7	7.14%
3.55 (build 1020)	5	5.10%
3.53 (build 1493)	4	4.08%
3.52 (build 1375)	4	4.08%
3.53 (build 2011)	3	3.06%
3.53 (build 1494)	2	2.04%
3.53 (build 2013)	2	2.04%
3.8-Build_1080	2	2.04%
3.81-Build_1055	1	1.02%
3.61-Build_1014	1	1.02%
3.51 (build 1321)	1	1.02%
3.8-Build_3065	1	1.02%
3.6-Build_3013	1	1.02%
3.55 (build 2003)	1	1.02%
3.6-Build_1273	1	1.02%
3.6-Build_1246	1	1.02%
3.81-Build_1032	1	1.02%
3.8-Build_3045	1	1.02%
3.6-Build_1207	1	1.02%
Other	0	0.00%
Mercury (81 servers)
Version	Number of Servers	Percent
1.48	45	55.56%
3.32	22	27.16%
3.21c	5	6.17%
3.01a	2	2.47%
1.47	2	2.47%
3.30	2	2.47%
3.21	1	1.23%
1.44	1	1.23%
1.49	1	1.23%
Other	0	0.00%
WebSTAR V (57 servers)
Version	Number of Servers	Percent
5.4.1	22	38.60%
5.4.0	13	22.81%
5.3.4	11	19.30%
5.3.2	5	8.77%
5.3.3	4	7.02%
5.3.0	1	1.75%
5.3.1	1	1.75%
Other	0	0.00%
Neon Mail Server (49 servers)
Version	Number of Servers	Percent
3.1.3	13	26.53%
3.0.7	12	24.49%
3.0.9	8	16.33%
3.1.4	5	10.20%
3.1.2	4	8.16%
3.1.0	3	6.12%
3.1.5	2	4.08%
3.1.1	1	2.04%
3.0.6	1	2.04%
Other	0	0.00%
MessageWall (26 servers)
Version	Number of Servers	Percent
1.0.8	24	92.31%
1.0.6	1	3.85%
1.1.0	1	3.85%
Other	0	0.00%
WebSTAR (25 servers)
Version	Number of Servers	Percent
Other	25	100.00%
OpenVMS (25 servers)
Version	Number of Servers	Percent
8.3	12	48.00%
7.3	7	28.00%
8.4	2	8.00%
8.2	2	8.00%
6.1	1	4.00%
7.2	1	4.00%
Other	0	0.00%
ModusMail (24 servers)
Version	Number of Servers	Percent
4.35.477.0	9	37.50%
4.35.480.0	3	12.50%
4.1.361.21	2	8.33%
3.1.302.0	2	8.33%
4.35.480.11	2	8.33%
4.2.425.22	1	4.17%
3.2.315.0	1	4.17%
4.0.340.3	1	4.17%
3.1.293.1	1	4.17%
4.3.459.0	1	4.17%
4.35.477.8	1	4.17%
Other	0	0.00%
MAILsweeper (12 servers)
Version	Number of Servers	Percent
4.3.17.0	4	33.33%
4.3.20.0	2	16.67%
4.3.19.0	2	16.67%
4.3.14.0	2	16.67%
4.3.1.0	1	8.33%
4.3.6.0	1	8.33%
Other	0	0.00%
OpenSMTPD (7 servers)
Version	Number of Servers	Percent
Other	7	100.00%