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	2,041,893	100.0%
Number of Servers that didn't respond	334,772	16.40%
Server didn't open socket	322,294	15.78%
Server didn't provide banner	12,478	0.61%
Server provided banner	1,707,121	83.60%
Server banner identifies software in use	950,143	46.53%

As indicated by the above table, of the 2,041,893 servers queried, only 950,143 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	292,089	30.74%
Postfix	189,337	19.93%
Microsoft	185,204	19.49%
Sendmail	176,240	18.55%
MailEnable	29,147	3.07%
MDaemon	23,020	2.42%
IMail	15,017	1.58%
Kerio	7,437	0.78%
Lotus Domino	5,653	0.59%
WinWebMail	5,257	0.55%
CommuniGate Pro	4,097	0.43%
Merak	3,251	0.34%
XMail	2,714	0.29%
Qmail Toaster	1,814	0.19%
ArGoSoft	1,667	0.18%
GroupWise	1,615	0.17%
SurgeSMTP	1,492	0.16%
Trend Micro	1,289	0.14%
Gordano Messaging Suite (GMS)	687	0.07%
Post.Office	623	0.07%
Mirapoint	435	0.05%
MagicMail	417	0.04%
VisNetic	392	0.04%
InterScan VirusWall	372	0.04%
NetIQ MailMarshal	212	0.02%
Interscan	165	0.02%
WebSTAR V	105	0.01%
Mercury	104	0.01%
Neon Mail Server	102	0.01%
MessageWall	54	0.01%
ModusMail	40	0.00%
WebSTAR	38	0.00%
MAILsweeper	29	0.00%
OpenVMS	26	0.00%
OpenSMTPD	2	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (292,089 servers)
Version	Number of Servers	Percent
4.69	244,703	83.78%
4.63	14,291	4.89%
4.67	13,398	4.59%
4.66	4,235	1.45%
4.68	3,106	1.06%
4.60	2,926	1.00%
Other	9,430	3.23%
Postfix (189,337 servers)
Version	Number of Servers	Percent
Other	189,337	100.00%
Microsoft (185,204 servers)
Version	Number of Servers	Percent
6.0.3790.3959	158,285	85.47%
6.0.3790.1830	15,404	8.32%
5.0.2195.6713	7,548	4.08%
Other	3,967	2.14%
Sendmail (176,240 servers)
Version	Number of Servers	Percent
8.13.1	34,426	19.53%
8.13.8	24,176	13.72%
8.14.3	17,990	10.21%
8.12.11.20060614	15,132	8.59%
8.12.11.20060308	14,772	8.38%
8.13.6	12,447	7.06%
8.13.6.20060614	10,467	5.94%
8.12.10	6,798	3.86%
8.11.6	6,332	3.59%
8.14.2	5,610	3.18%
8.14.1	4,671	2.65%
8.12.11	4,618	2.62%
8.13.4	3,580	2.03%
8.13.7	3,260	1.85%
8.12.8	2,965	1.68%
8.9.3	1,856	1.05%
Other	7,140	4.05%
MailEnable (29,147 servers)
Version	Number of Servers	Percent
1.986--	7,937	27.23%
1.981--	3,935	13.50%
1.983--	2,563	8.79%
3.62--	1,680	5.76%
1.95--	773	2.65%
1.96--	763	2.62%
0-3.63-	617	2.12%
1.9--	609	2.09%
0-3.61-	534	1.83%
0-3.6-	512	1.76%
4.0--	452	1.55%
0-2.53-	450	1.54%
0-1.87-	434	1.49%
1.8--	421	1.44%
0-3.62-	409	1.40%
0-3.14-	391	1.34%
0-2.37-	351	1.20%
--3.63	335	1.15%
--3.61	295	1.01%
Other	5,686	19.51%
MDaemon (23,020 servers)
Version	Number of Servers	Percent
10.1.2	3,393	14.74%
10.1.1	2,979	12.94%
10.0.0	1,451	6.30%
9.6.1	1,113	4.83%
10.0.5	1,082	4.70%
9.6.6	986	4.28%
10.1.0	819	3.56%
10.0.4	813	3.53%
9.6.5	755	3.28%
9.5.2	708	3.08%
10.0.2	623	2.71%
9.6.4	569	2.47%
8.1.3	561	2.44%
9.5.1	543	2.36%
9.5.6	532	2.31%
9.6.2	510	2.22%
9.0.4	490	2.13%
9.6.3	322	1.40%
6.8.5	309	1.34%
7.2.3	302	1.31%
9.0.1	283	1.23%
9.5.5	279	1.21%
10.0.1	261	1.13%
7.2.0	260	1.13%
Other	3,077	13.37%
IMail (15,017 servers)
Version	Number of Servers	Percent
8.22	2,894	19.27%
11.0	1,689	11.25%
8.15	1,477	9.84%
9.23	1,183	7.88%
10.02	1,041	6.93%
8.05	823	5.48%
9.10	584	3.89%
9.20	570	3.80%
7.07	530	3.53%
10.01	524	3.49%
9.21	423	2.82%
7.15	389	2.59%
6.06	317	2.11%
8.00	282	1.88%
8.21	204	1.36%
8.10	195	1.30%
10.0	192	1.28%
8.04	183	1.22%
8.01	169	1.13%
9.22	166	1.11%
Other	1,182	7.87%
Kerio (7,437 servers)
Version	Number of Servers	Percent
6.7.2	2,023	27.20%
6.7.0	986	13.26%
6.6.2	886	11.91%
6.7.1	683	9.18%
6.5.2	381	5.12%
6.5.0	351	4.72%
6.4.1	260	3.50%
6.3.1	240	3.23%
6.6.0	194	2.61%
6.5.1	190	2.55%
6.4.0	169	2.27%
6.6.1	150	2.02%
6.7.3	139	1.87%
6.4.2	124	1.67%
6.3.0	111	1.49%
Other	550	7.40%
Lotus Domino (5,653 servers)
Version	Number of Servers	Percent
8.5	602	10.65%
8.5.1	467	8.26%
7.0.2	448	7.92%
8.0.2	330	5.84%
8.0.1	297	5.25%
7.0.3	284	5.02%
7.0.1	243	4.30%
6.5.4	220	3.89%
6.5.1	200	3.54%
8.5FP1	186	3.29%
6.5.3	173	3.06%
7.0.2FP2	166	2.94%
7.0.3FP1	162	2.87%
6.5.5	148	2.62%
7.0	144	2.55%
8.0	144	2.55%
6.5	125	2.21%
5.0.11	72	1.27%
7.0.2FP1	69	1.22%
8.0.2FP1	67	1.19%
6.5.2	66	1.17%
7.0.2FP3	60	1.06%
6.5.6	60	1.06%
Other	920	16.27%
WinWebMail (5,257 servers)
Version	Number of Servers	Percent
3.8.0.1	1,165	22.16%
3.7.6.1	1,003	19.08%
3.7.3.1	793	15.08%
3.7.7.3	736	14.00%
3.7.1.1	426	8.10%
3.7.5.1	257	4.89%
3.6.3.1	224	4.26%
3.7.7.1	186	3.54%
3.7.0.5	183	3.48%
3.7.0.7	124	2.36%
3.7.0.3	123	2.34%
Other	37	0.70%
CommuniGate Pro (4,097 servers)
Version	Number of Servers	Percent
5.2.16	335	8.18%
4.1.8	265	6.47%
5.1.13	185	4.52%
5.2.14	175	4.27%
4.2.10	165	4.03%
5.1.16	153	3.73%
5.2.12	153	3.73%
5.2.13	135	3.30%
5.2.17	131	3.20%
5.1.12	113	2.76%
5.2.18	110	2.68%
5.2.8	104	2.54%
5.2.3	103	2.51%
5.2.10	95	2.32%
5.0.14	86	2.10%
5.2.15	77	1.88%
5.2.11	74	1.81%
5.0.13	69	1.68%
5.2.6	64	1.56%
5.0.9	63	1.54%
5.1.14	62	1.51%
5.1.9	59	1.44%
5.2.9	59	1.44%
5.2.5	49	1.20%
5.2.0	47	1.15%
4.2.8	45	1.10%
4.2.9	45	1.10%
5.1.7	44	1.07%
4.2	43	1.05%
5.3	42	1.03%
4.3.12	42	1.03%
Other	905	22.09%
Merak (3,251 servers)
Version	Number of Servers	Percent
8.0.3	1,348	41.46%
8.9.1	304	9.35%
8.5.0	202	6.21%
7.4.5	193	5.94%
8.3.8	136	4.18%
7.5.2	135	4.15%
7.6.4	130	4.00%
7.4.2	57	1.75%
7.2.0	48	1.48%
9.0.0	47	1.45%
8.2.13	47	1.45%
7.6.1	46	1.41%
7.0.1	36	1.11%
8.2.4	34	1.05%
6.2.1	33	1.02%
8.3.15	33	1.02%
Other	422	12.98%
XMail (2,714 servers)
Version	Number of Servers	Percent
1.25	742	27.34%
1.22	691	25.46%
1.24	405	14.92%
1.26	278	10.24%
1.21	169	6.23%
1.23	86	3.17%
1.20	82	3.02%
1.17	74	2.73%
1.12	66	2.43%
Other	121	4.46%
Qmail Toaster (1,814 servers)
Version	Number of Servers	Percent
1.3	1,611	88.81%
1.2	156	8.60%
1.0	31	1.71%
Other	16	0.88%
ArGoSoft (1,667 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.5)	314	18.84%
1.8 (1.8.9.3)	240	14.40%
1.8 (1.8.9.6)	235	14.10%
1.8 (1.8.9.1)	161	9.66%
1.8 (1.8.8.8)	125	7.50%
1.8 (1.8.8.7)	113	6.78%
1.8 (1.8.9.2)	72	4.32%
1.8 (1.8.9.4)	48	2.88%
1.8 (1.8.8.9)	37	2.22%
1.8 (1.8.8.1)	32	1.92%
1.8 (1.8.6.0)	31	1.86%
1.8 (1.8.9.0)	28	1.68%
Other	231	13.86%
GroupWise (1,615 servers)
Version	Number of Servers	Percent
7.0.3	519	32.14%
7.0.2	203	12.57%
6.5.7	182	11.27%
8.0.1	122	7.55%
7.0.1	106	6.56%
6.5.4	95	5.88%
8.0.0	92	5.70%
6.5.6	66	4.09%
6.0.4	54	3.34%
6.5.1	45	2.79%
6.5.5	32	1.98%
7.0	18	1.11%
Other	81	5.02%
SurgeSMTP (1,492 servers)
Version	Number of Servers	Percent
4.2a3-3	345	23.12%
3.9e-1	299	20.04%
4.0u4-4	150	10.05%
3.8k4-4	95	6.37%
3.9c-1	44	2.95%
3.8i3-3	42	2.82%
3.8f3-3	40	2.68%
3.7b8-8	38	2.55%
4.2d2-2	33	2.21%
3.6f5-5	32	2.14%
3.9g2-2	31	2.08%
3.9h-65	28	1.88%
3.5b3-3	23	1.54%
3.8f2-2	23	1.54%
4.2d-1	19	1.27%
4.0u3-3	17	1.14%
3.0c2-2	15	1.01%
Other	218	14.61%
Trend Micro (1,289 servers)
Version	Number of Servers	Percent
5.7	621	48.18%
5.5	363	28.16%
5.18	193	14.97%
7.0	88	6.83%
Other	24	1.86%
Gordano Messaging Suite (GMS) (687 servers)
Version	Number of Servers	Percent
Other	687	100.00%
Post.Office (623 servers)
Version	Number of Servers	Percent
3.5.3	114	18.30%
4.1.0.2	72	11.56%
4.0.1	55	8.83%
3.5.3J	46	7.38%
3.8.3	30	4.82%
4.1.0.4	22	3.53%
3.9.2.3	20	3.21%
3.9.1	18	2.89%
3.1.2J	18	2.89%
3.6.2	17	2.73%
3.6.3	16	2.57%
3.9.2	15	2.41%
3.1.2	13	2.09%
3.8.7.4	13	2.09%
4.1.0.3	12	1.93%
4.1	12	1.93%
4.1.1	11	1.77%
4.0.0.2	11	1.77%
4.0.0.1	10	1.61%
3.8.4	10	1.61%
3.9.0	9	1.44%
3.9.2.1	8	1.28%
3.9.1.3	7	1.12%
3.5.2	7	1.12%
Other	57	9.15%
Mirapoint (435 servers)
Version	Number of Servers	Percent
3.8.4-GA	50	11.49%
3.8.3-GA	46	10.57%
3.10.7-GA	40	9.20%
3.10.5-GA	40	9.20%
3.10.8-GA	28	6.44%
3.10.4-GA	27	6.21%
4.1.3-GA	20	4.60%
3.10.6-GA	19	4.37%
3.10.3-GA	17	3.91%
3.8.2-GA	14	3.22%
3.8.7a	13	2.99%
3.8.6-GA	13	2.99%
3.8.5-GA	12	2.76%
4.1.4-GA	12	2.76%
4.1.8-GA	11	2.53%
3.7.5a-GA	10	2.30%
4.1.5-GA	9	2.07%
4.1.6-GA	9	2.07%
4.0.5a	8	1.84%
3.7.3a-GA	7	1.61%
4.1.7a-GA	7	1.61%
3.7.4b-GA	5	1.15%
3.10.2-GA	5	1.15%
Other	13	2.99%
MagicMail (417 servers)
Version	Number of Servers	Percent
Other	417	100.00%
VisNetic (392 servers)
Version	Number of Servers	Percent
9.3.2.0	154	39.29%
9.1.4.1	51	13.01%
5.8.6.6	20	5.10%
6.2.2.0	13	3.32%
8.5.0.8	12	3.06%
5.5.8.3	12	3.06%
5.0.2.3	11	2.81%
9.1.4.0	11	2.81%
8.0.3.1	10	2.55%
8.3.6	8	2.04%
5.3.5.0	8	2.04%
7.6.1.0	8	2.04%
7.2.4.1	8	2.04%
5.4.5.4	8	2.04%
8.3.5.0	7	1.79%
8.0.3.0	7	1.79%
8.0.3	6	1.53%
7.2.4.0	4	1.02%
Other	34	8.67%
InterScan VirusWall (372 servers)
Version	Number of Servers	Percent
Other	372	100.00%
NetIQ MailMarshal (212 servers)
Version	Number of Servers	Percent
6.0.3.8	160	75.47%
6.1.3.15	15	7.08%
5.5.6.7	14	6.60%
5.5.6.6	4	1.89%
5.5.6.5	4	1.89%
5.5.4.16	4	1.89%
Other	11	5.19%
Interscan (165 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	31	18.79%
3.55 (build 1029)	21	12.73%
3.81-Build_1022	20	12.12%
3.53 (build 2017)	17	10.30%
3.81-Build_1084	12	7.27%
3.8-Build_3013	11	6.67%
3.53 (build 2011)	9	5.45%
3.53 (build 1493)	9	5.45%
3.55 (build 1020)	7	4.24%
3.53 (build 2013)	6	3.64%
3.52 (build 1375)	3	1.82%
3.53 (build 1494)	2	1.21%
3.81-Build_1055	2	1.21%
3.8-Build_1080	2	1.21%
Other	13	7.88%
WebSTAR V (105 servers)
Version	Number of Servers	Percent
5.4.1	34	32.38%
5.4.0	27	25.71%
5.3.4	25	23.81%
5.3.2	9	8.57%
5.3.3	6	5.71%
5.3.1	2	1.90%
Other	2	1.90%
Mercury (104 servers)
Version	Number of Servers	Percent
1.48	52	50.00%
3.32	30	28.85%
3.21c	9	8.65%
1.47	3	2.88%
3.21	2	1.92%
3.01a	2	1.92%
1.49	2	1.92%
Other	4	3.85%
Neon Mail Server (102 servers)
Version	Number of Servers	Percent
3.1.3	26	25.49%
3.0.7	20	19.61%
3.0.9	12	11.76%
3.1.4	11	10.78%
3.1.2	10	9.80%
3.1.0	9	8.82%
3.1.5	6	5.88%
3.1.1	3	2.94%
3.0.8	2	1.96%
3.0.6	2	1.96%
Other	1	0.98%
MessageWall (54 servers)
Version	Number of Servers	Percent
1.0.8	35	64.81%
1.0.11	16	29.63%
1.1.0	2	3.70%
1.0.6	1	1.85%
Other	0	0.00%
ModusMail (40 servers)
Version	Number of Servers	Percent
4.35.477.0	10	25.00%
4.35.480.0	7	17.50%
3.1.302.0	6	15.00%
4.2.420.0	4	10.00%
4.1.361.21	2	5.00%
3.2.315.0	2	5.00%
3.1.293.1	2	5.00%
4.35.480.11	2	5.00%
4.2.425.22	1	2.50%
4.1.361.0	1	2.50%
4.0.340.3	1	2.50%
4.3.459.0	1	2.50%
4.35.477.8	1	2.50%
Other	0	0.00%
WebSTAR (38 servers)
Version	Number of Servers	Percent
Other	38	100.00%
MAILsweeper (29 servers)
Version	Number of Servers	Percent
4.3.20.0	8	27.59%
4.3.14.0	5	17.24%
4.3.17.0	5	17.24%
4.3.1.0	3	10.34%
4.2.10.0	2	6.90%
4.3.6.0	2	6.90%
4.3.19.0	1	3.45%
4.3.10.0	1	3.45%
4.3.12.0	1	3.45%
4.2.5.0	1	3.45%
Other	0	0.00%
OpenVMS (26 servers)
Version	Number of Servers	Percent
8.3	16	61.54%
7.3	6	23.08%
8.2	2	7.69%
6.1	1	3.85%
7.2	1	3.85%
Other	0	0.00%
OpenSMTPD (2 servers)
Version	Number of Servers	Percent
Other	2	100.00%