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	2,009,725	100.0%
Number of Servers that didn't respond	319,073	15.88%
Server didn't open socket	306,798	15.27%
Server didn't provide banner	12,275	0.61%
Server provided banner	1,690,652	84.12%
Server banner identifies software in use	932,296	46.39%

As indicated by the above table, of the 2,009,725 servers queried, only 932,296 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	319,837	34.31%
Postfix	189,922	20.37%
Microsoft	166,766	17.89%
Sendmail	157,291	16.87%
MailEnable	29,521	3.17%
MDaemon	21,801	2.34%
IMail	13,017	1.40%
Kerio	5,119	0.55%
Lotus Domino	5,073	0.54%
WinWebMail	4,914	0.53%
CommuniGate Pro	3,741	0.40%
Merak	2,728	0.29%
XMail	2,486	0.27%
Qmail Toaster	1,657	0.18%
ArGoSoft	1,448	0.16%
SurgeSMTP	1,376	0.15%
GroupWise	1,366	0.15%
Trend Micro	987	0.11%
Gordano Messaging Suite (GMS)	587	0.06%
Post.Office	530	0.06%
MagicMail	457	0.05%
Mirapoint	390	0.04%
VisNetic	306	0.03%
InterScan VirusWall	289	0.03%
NetIQ MailMarshal	159	0.02%
Interscan	123	0.01%
Mercury	96	0.01%
WebSTAR V	79	0.01%
Neon Mail Server	79	0.01%
MessageWall	33	0.00%
ModusMail	33	0.00%
WebSTAR	30	0.00%
OpenVMS	25	0.00%
MAILsweeper	25	0.00%
OpenSMTPD	5	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (319,837 servers)
Version	Number of Servers	Percent
4.69	271,568	84.91%
4.67	13,966	4.37%
4.63	12,710	3.97%
4.71	6,597	2.06%
Other	14,996	4.69%
Postfix (189,922 servers)
Version	Number of Servers	Percent
Other	189,922	100.00%
Microsoft (166,766 servers)
Version	Number of Servers	Percent
6.0.3790.3959	77,470	46.45%
6.0.3790.4675	69,122	41.45%
6.0.3790.1830	11,208	6.72%
5.0.2195.6713	3,660	2.19%
5.0.2195.7381	1,962	1.18%
Other	3,344	2.01%
Sendmail (157,291 servers)
Version	Number of Servers	Percent
8.13.1	30,073	19.12%
8.13.8	25,089	15.95%
8.14.3	14,794	9.41%
8.12.11.20060614	12,583	8.00%
8.12.11.20060308	12,557	7.98%
8.14.4	11,412	7.26%
8.13.6	6,605	4.20%
8.13.6.20060614	6,260	3.98%
8.12.10	5,498	3.50%
8.11.6	5,194	3.30%
8.14.2	4,954	3.15%
8.14.1	3,677	2.34%
8.12.11	3,511	2.23%
8.13.4	2,849	1.81%
8.13.7	2,843	1.81%
8.12.8	2,337	1.49%
Other	7,055	4.49%
MailEnable (29,521 servers)
Version	Number of Servers	Percent
1.986--	8,940	30.28%
1.981--	3,369	11.41%
1.983--	2,161	7.32%
3.62--	1,405	4.76%
4.22--	772	2.62%
0-3.63-	767	2.60%
1.96--	614	2.08%
1.95--	604	2.05%
0-4.22-	491	1.66%
1.9--	478	1.62%
0-2.53-	437	1.48%
0-1.87-	433	1.47%
4.17--	421	1.43%
0-3.61-	414	1.40%
0-3.6-	406	1.38%
4.22--4.22	396	1.34%
--3.63	364	1.23%
0-3.14-	344	1.17%
4.0--	336	1.14%
0-3.62-	326	1.10%
1.8--	297	1.01%
Other	5,746	19.46%
MDaemon (21,801 servers)
Version	Number of Servers	Percent
10.1.2	2,749	12.61%
11.0.1	2,274	10.43%
11.0.0	1,845	8.46%
10.1.1	1,380	6.33%
10.0.0	1,337	6.13%
9.6.1	924	4.24%
9.6.6	825	3.78%
10.1.0	768	3.52%
10.0.5	695	3.19%
9.6.5	597	2.74%
9.5.2	575	2.64%
10.0.4	525	2.41%
10.0.2	495	2.27%
9.5.1	492	2.26%
9.6.4	470	2.16%
8.1.3	440	2.02%
9.6.2	432	1.98%
9.5.6	422	1.94%
9.0.4	392	1.80%
9.6.3	271	1.24%
7.2.3	266	1.22%
6.8.5	252	1.16%
9.5.5	249	1.14%
9.0.1	237	1.09%
Other	2,889	13.25%
IMail (13,017 servers)
Version	Number of Servers	Percent
8.22	2,448	18.81%
11.01	1,442	11.08%
8.15	1,248	9.59%
9.23	971	7.46%
11.0	849	6.52%
10.02	794	6.10%
8.05	620	4.76%
9.10	495	3.80%
9.20	487	3.74%
7.07	463	3.56%
9.21	367	2.82%
10.01	330	2.54%
7.15	310	2.38%
8.00	264	2.03%
6.06	249	1.91%
8.04	191	1.47%
8.10	142	1.09%
8.21	138	1.06%
8.01	133	1.02%
Other	1,076	8.27%
Kerio (5,119 servers)
Version	Number of Servers	Percent
6.7.3	947	18.50%
6.7.2	618	12.07%
6.6.2	555	10.84%
6.7.0	543	10.61%
6.7.1	294	5.74%
6.5.0	289	5.65%
6.5.2	277	5.41%
6.4.1	210	4.10%
6.3.1	201	3.93%
6.5.1	155	3.03%
6.6.0	140	2.73%
6.4.0	136	2.66%
6.4.2	114	2.23%
6.6.1	98	1.91%
6.3.0	93	1.82%
Other	449	8.77%
Lotus Domino (5,073 servers)
Version	Number of Servers	Percent
8.5.1	622	12.26%
8.5	456	8.99%
7.0.2	382	7.53%
8.5.1FP2	240	4.73%
8.0.2	237	4.67%
7.0.3	216	4.26%
8.0.1	203	4.00%
7.0.1	200	3.94%
6.5.4	168	3.31%
6.5.1	166	3.27%
8.5.1FP1	142	2.80%
7.0.3FP1	141	2.78%
6.5.3	140	2.76%
7.0.2FP2	128	2.52%
8.0	122	2.40%
6.5.5	119	2.35%
8.5FP1	116	2.29%
7.0	113	2.23%
6.5	101	1.99%
5.0.11	69	1.36%
7.0.2FP3	54	1.06%
Other	938	18.49%
WinWebMail (4,914 servers)
Version	Number of Servers	Percent
3.8.0.1	1,391	28.31%
3.7.6.1	858	17.46%
3.7.7.3	656	13.35%
3.7.3.1	640	13.02%
3.7.1.1	319	6.49%
3.7.5.1	223	4.54%
3.6.3.1	163	3.32%
3.7.7.1	156	3.17%
3.7.0.5	148	3.01%
3.7.0.3	116	2.36%
3.8.1.1	112	2.28%
3.7.0.7	101	2.06%
Other	31	0.63%
CommuniGate Pro (3,741 servers)
Version	Number of Servers	Percent
5.1.16	233	6.23%
5.2.16	219	5.85%
4.1.8	217	5.80%
5.3.5	195	5.21%
4.2.10	148	3.96%
5.2.19	120	3.21%
5.2.14	120	3.21%
5.3.2	92	2.46%
5.2.12	92	2.46%
5.2.3	91	2.43%
5.1.12	85	2.27%
5.2.8	84	2.25%
5.2.13	79	2.11%
5.2.18	77	2.06%
5.0.14	74	1.98%
5.1.13	73	1.95%
5.2.10	71	1.90%
5.3.6	70	1.87%
5.3.4	65	1.74%
5.1.14	59	1.58%
5.2.9	54	1.44%
5.0.9	51	1.36%
5.2.17	49	1.31%
5.2.6	47	1.26%
5.1.9	46	1.23%
5.2.11	43	1.15%
5.2.0	40	1.07%
5.3.1	40	1.07%
4.2.9	39	1.04%
4.2.8	38	1.02%
Other	1,030	27.53%
Merak (2,728 servers)
Version	Number of Servers	Percent
8.0.3	1,157	42.41%
8.9.1	263	9.64%
8.5.0	168	6.16%
7.4.5	138	5.06%
7.5.2	126	4.62%
8.3.8	106	3.89%
7.6.4	105	3.85%
8.2.13	45	1.65%
7.4.2	44	1.61%
9.0.0	41	1.50%
7.2.0	37	1.36%
7.6.1	36	1.32%
8.3.15	33	1.21%
8.2.4	29	1.06%
Other	400	14.66%
XMail (2,486 servers)
Version	Number of Servers	Percent
1.25	625	25.14%
1.22	602	24.22%
1.26	357	14.36%
1.24	340	13.68%
1.21	138	5.55%
1.23	73	2.94%
1.27	65	2.61%
1.20	62	2.49%
1.17	61	2.45%
1.12	56	2.25%
Other	107	4.30%
Qmail Toaster (1,657 servers)
Version	Number of Servers	Percent
1.3	1,508	91.01%
1.2	113	6.82%
1.0	26	1.57%
Other	10	0.60%
ArGoSoft (1,448 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	260	17.96%
1.8 (1.8.9.5)	253	17.47%
1.8 (1.8.9.3)	186	12.85%
1.8 (1.8.9.1)	128	8.84%
1.8 (1.8.8.8)	114	7.87%
1.8 (1.8.8.7)	93	6.42%
1.8 (1.8.9.2)	59	4.07%
1.8 (1.8.9.4)	47	3.25%
1.8 (1.8.8.1)	31	2.14%
1.8 (1.8.8.9)	30	2.07%
1.8 (1.8.9.0)	25	1.73%
1.8 (1.8.6.0)	24	1.66%
Other	198	13.67%
SurgeSMTP (1,376 servers)
Version	Number of Servers	Percent
4.2d4-4	264	19.19%
3.9e-1	173	12.57%
4.3e-1	126	9.16%
4.2d2-2	102	7.41%
4.0u4-4	89	6.47%
3.8k4-4	80	5.81%
4.3c-1	51	3.71%
4.2a3-3	42	3.05%
3.7b8-8	32	2.33%
3.8i3-3	32	2.33%
3.8f3-3	30	2.18%
3.9c-1	29	2.11%
4.3g-1	29	2.11%
3.6f5-5	27	1.96%
3.5b3-3	23	1.67%
3.9g2-2	19	1.38%
3.8f2-2	18	1.31%
Other	210	15.26%
GroupWise (1,366 servers)
Version	Number of Servers	Percent
7.0.3	403	29.50%
8.0.1	175	12.81%
6.5.7	162	11.86%
7.0.2	156	11.42%
7.0.1	85	6.22%
6.5.4	82	6.00%
8.0.0	54	3.95%
6.5.6	54	3.95%
6.0.4	43	3.15%
6.5.1	40	2.93%
6.5.5	22	1.61%
7.0	15	1.10%
Other	75	5.49%
Trend Micro (987 servers)
Version	Number of Servers	Percent
5.7	448	45.39%
5.5	286	28.98%
5.18	147	14.89%
7.0	77	7.80%
7	11	1.11%
Other	18	1.82%
Gordano Messaging Suite (GMS) (587 servers)
Version	Number of Servers	Percent
Other	587	100.00%
Post.Office (530 servers)
Version	Number of Servers	Percent
3.5.3	99	18.68%
4.1.0.2	61	11.51%
4.0.1	45	8.49%
3.5.3J	34	6.42%
4.1.1	21	3.96%
3.8.3	21	3.96%
3.9.2.3	17	3.21%
4.1.0.4	17	3.21%
3.1.2J	17	3.21%
3.6.3	16	3.02%
3.9.2	13	2.45%
3.1.2	12	2.26%
3.6.2	12	2.26%
3.8.7.4	12	2.26%
3.9.1	11	2.08%
4.1	10	1.89%
4.0.0.2	10	1.89%
4.0.1.1	9	1.70%
3.8.4	8	1.51%
3.9.0	7	1.32%
3.9.2.1	7	1.32%
4.1.0.3	7	1.32%
3.9.1.3	6	1.13%
4.0.0.1	6	1.13%
3.5.2	6	1.13%
Other	46	8.68%
MagicMail (457 servers)
Version	Number of Servers	Percent
Other	457	100.00%
Mirapoint (390 servers)
Version	Number of Servers	Percent
3.8.4-GA	40	10.26%
3.8.3-GA	37	9.49%
3.10.8-GA	34	8.72%
3.10.5-GA	33	8.46%
3.10.7-GA	30	7.69%
3.10.9-GA	25	6.41%
3.10.4-GA	24	6.15%
4.1.3-GA	17	4.36%
4.1.8-GA	15	3.85%
3.10.6-GA	13	3.33%
4.1.9-GA	11	2.82%
3.8.7a	11	2.82%
3.8.6-GA	10	2.56%
3.10.3-GA	9	2.31%
4.1.4-GA	9	2.31%
3.8.2-GA	9	2.31%
3.8.5-GA	8	2.05%
3.7.5a-GA	8	2.05%
4.1.5-GA	7	1.79%
4.0.5a	6	1.54%
3.10.2-GA	6	1.54%
3.7.3a-GA	5	1.28%
4.1.6-GA	5	1.28%
4.1.7a-GA	4	1.03%
Other	14	3.59%
VisNetic (306 servers)
Version	Number of Servers	Percent
9.3.2.0	119	38.89%
9.1.4.1	41	13.40%
5.8.6.6	15	4.90%
8.5.0.8	13	4.25%
8.0.3.1	10	3.27%
6.2.2.0	10	3.27%
5.5.8.3	9	2.94%
9.1.4.0	9	2.94%
7.6.1.0	9	2.94%
8.0.3.0	8	2.61%
8.3.5.0	7	2.29%
8.3.6	6	1.96%
5.3.5.0	6	1.96%
5.0.2.3	5	1.63%
8.0.3	5	1.63%
7.2.4.1	5	1.63%
5.4.5.4	4	1.31%
Other	25	8.17%
InterScan VirusWall (289 servers)
Version	Number of Servers	Percent
Other	289	100.00%
NetIQ MailMarshal (159 servers)
Version	Number of Servers	Percent
6.0.3.8	120	75.47%
6.1.3.15	11	6.92%
5.5.6.7	11	6.92%
5.5.6.6	3	1.89%
5.5.4.16	3	1.89%
5.5.6.5	3	1.89%
Other	8	5.03%
Interscan (123 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	20	16.26%
3.81-Build_1022	19	15.45%
3.53 (build 2017)	14	11.38%
3.55 (build 1029)	13	10.57%
3.81-Build_1084	11	8.94%
3.8-Build_3013	7	5.69%
3.53 (build 2011)	6	4.88%
3.53 (build 1493)	5	4.07%
3.53 (build 2013)	5	4.07%
3.55 (build 1020)	5	4.07%
3.52 (build 1375)	3	2.44%
3.53 (build 1494)	2	1.63%
3.81-Build_1055	2	1.63%
3.8-Build_1080	2	1.63%
Other	9	7.32%
Mercury (96 servers)
Version	Number of Servers	Percent
1.48	48	50.00%
3.32	26	27.08%
3.21c	8	8.33%
1.47	3	3.12%
1.44	2	2.08%
3.01a	2	2.08%
1.49	2	2.08%
3.30	2	2.08%
3.21	1	1.04%
4.52	1	1.04%
3.31	1	1.04%
Other	0	0.00%
WebSTAR V (79 servers)
Version	Number of Servers	Percent
5.4.1	24	30.38%
5.4.0	22	27.85%
5.3.4	19	24.05%
5.3.2	7	8.86%
5.3.3	5	6.33%
5.3.0	1	1.27%
5.3.1	1	1.27%
Other	0	0.00%
Neon Mail Server (79 servers)
Version	Number of Servers	Percent
3.1.3	18	22.78%
3.0.7	16	20.25%
3.1.4	10	12.66%
3.0.9	10	12.66%
3.1.2	8	10.13%
3.1.0	6	7.59%
3.1.5	6	7.59%
3.1.1	2	2.53%
3.0.8	1	1.27%
3.0.6	1	1.27%
3.0.5	1	1.27%
Other	0	0.00%
MessageWall (33 servers)
Version	Number of Servers	Percent
1.0.8	26	78.79%
1.0.11	5	15.15%
1.0.6	1	3.03%
1.1.0	1	3.03%
Other	0	0.00%
ModusMail (33 servers)
Version	Number of Servers	Percent
4.35.480.0	7	21.21%
4.35.477.0	6	18.18%
4.2.420.0	5	15.15%
3.1.302.0	3	9.09%
4.1.361.21	2	6.06%
3.2.315.0	2	6.06%
3.1.293.1	2	6.06%
4.35.480.11	2	6.06%
4.2.425.22	1	3.03%
4.0.340.3	1	3.03%
4.3.459.0	1	3.03%
4.35.477.8	1	3.03%
Other	0	0.00%
WebSTAR (30 servers)
Version	Number of Servers	Percent
Other	30	100.00%
OpenVMS (25 servers)
Version	Number of Servers	Percent
8.3	14	56.00%
7.3	7	28.00%
8.2	2	8.00%
6.1	1	4.00%
7.2	1	4.00%
Other	0	0.00%
MAILsweeper (25 servers)
Version	Number of Servers	Percent
4.3.20.0	7	28.00%
4.3.14.0	5	20.00%
4.3.17.0	4	16.00%
4.3.6.0	3	12.00%
4.3.1.0	3	12.00%
4.3.19.0	1	4.00%
4.3.10.0	1	4.00%
4.2.5.0	1	4.00%
Other	0	0.00%
OpenSMTPD (5 servers)
Version	Number of Servers	Percent
Other	5	100.00%