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	2,258,621	100.0%
Number of Servers that didn't respond	385,040	17.05%
Server didn't open socket	372,143	16.48%
Server didn't provide banner	12,897	0.57%
Server provided banner	1,873,581	82.95%
Server banner identifies software in use	1,018,499	45.09%

As indicated by the above table, of the 2,258,621 servers queried, only 1,018,499 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	403,043	39.57%
Postfix	230,129	22.59%
Microsoft	149,528	14.68%
Sendmail	140,867	13.83%
MailEnable	32,609	3.20%
MDaemon	22,131	2.17%
IMail	10,939	1.07%
Lotus Domino	5,115	0.50%
WinWebMail	4,522	0.44%
CommuniGate Pro	3,632	0.36%
Kerio	2,876	0.28%
XMail	2,496	0.25%
Merak	2,063	0.20%
Qmail Toaster	1,745	0.17%
SurgeSMTP	1,290	0.13%
ArGoSoft	1,202	0.12%
GroupWise	1,043	0.10%
Trend Micro	651	0.06%
Post.Office	496	0.05%
Gordano Messaging Suite (GMS)	487	0.05%
MagicMail	385	0.04%
Mirapoint	284	0.03%
VisNetic	243	0.02%
InterScan VirusWall	228	0.02%
NetIQ MailMarshal	110	0.01%
Interscan	88	0.01%
Mercury	80	0.01%
WebSTAR V	59	0.01%
Neon Mail Server	52	0.01%
OpenVMS	24	0.00%
MessageWall	23	0.00%
ModusMail	22	0.00%
WebSTAR	21	0.00%
MAILsweeper	11	0.00%
OpenSMTPD	5	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (403,043 servers)
Version	Number of Servers	Percent
4.69	342,626	85.01%
4.72	19,338	4.80%
4.67	11,853	2.94%
4.63	6,209	1.54%
4.75	4,564	1.13%
4.71	4,405	1.09%
Other	14,048	3.49%
Postfix (230,129 servers)
Version	Number of Servers	Percent
Other	230,129	100.00%
Microsoft (149,528 servers)
Version	Number of Servers	Percent
6.0.3790.4675	109,618	73.31%
6.0.3790.3959	26,176	17.51%
6.0.3790.1830	7,017	4.69%
5.0.2195.7381	2,091	1.40%
Other	4,626	3.09%
Sendmail (140,867 servers)
Version	Number of Servers	Percent
8.13.8	31,150	22.11%
8.13.1	25,865	18.36%
8.14.3	19,131	13.58%
8.14.4	18,092	12.84%
8.12.11.20060308	6,743	4.79%
8.13.6.20060614	5,165	3.67%
8.14.2	4,204	2.98%
8.11.6	3,826	2.72%
8.12.10	3,776	2.68%
8.13.6	3,249	2.31%
8.14.1	3,057	2.17%
8.12.11.20060614	2,805	1.99%
8.12.11	2,246	1.59%
8.13.7	2,180	1.55%
8.13.4	2,122	1.51%
8.12.8	1,836	1.30%
Other	5,420	3.85%
MailEnable (32,609 servers)
Version	Number of Servers	Percent
1.986--	10,711	32.85%
1.981--	2,441	7.49%
4.26--	2,034	6.24%
1.983--	1,550	4.75%
3.62--	1,019	3.12%
0-3.63-	919	2.82%
4.22--	625	1.92%
0-4.26-	611	1.87%
4.23--	565	1.73%
1.96--	449	1.38%
0-2.53-	437	1.34%
0-1.87-	425	1.30%
5.10--	422	1.29%
1.95--	417	1.28%
--3.63	378	1.16%
4.14--	375	1.15%
Other	9,231	28.31%
MDaemon (22,131 servers)
Version	Number of Servers	Percent
11.0.3	4,291	19.39%
12.0.1	2,626	11.87%
10.1.2	1,274	5.76%
11.0.0	1,140	5.15%
10.0.0	1,138	5.14%
10.1.1	940	4.25%
12.0.0	855	3.86%
9.6.1	705	3.19%
9.6.6	664	3.00%
10.1.0	574	2.59%
9.5.2	466	2.11%
9.6.5	457	2.06%
10.0.5	450	2.03%
10.0.2	395	1.78%
9.6.2	368	1.66%
9.5.1	366	1.65%
9.5.6	357	1.61%
9.6.4	348	1.57%
10.0.4	339	1.53%
11.0.2	326	1.47%
8.1.3	323	1.46%
9.0.4	288	1.30%
11.0.1	249	1.13%
Other	3,192	14.42%
IMail (10,939 servers)
Version	Number of Servers	Percent
8.22	2,134	19.51%
11.02	856	7.83%
8.15	827	7.56%
11.03	825	7.54%
9.23	729	6.66%
11.01	579	5.29%
8.05	508	4.64%
9.20	459	4.20%
9.10	452	4.13%
10.02	395	3.61%
11.0	350	3.20%
7.07	303	2.77%
9.21	282	2.58%
7.15	258	2.36%
6.06	213	1.95%
8.00	210	1.92%
11.5	192	1.76%
10.01	159	1.45%
8.04	149	1.36%
Other	1,059	9.68%
Lotus Domino (5,115 servers)
Version	Number of Servers	Percent
8.5.2	601	11.75%
8.5.1	426	8.33%
8.5.2FP1	376	7.35%
7.0.2	302	5.90%
8.5	296	5.79%
7.0.3	173	3.38%
7.0.1	158	3.09%
8.0.1	155	3.03%
8.5.2FP2	154	3.01%
6.5.4	142	2.78%
8.0.2	142	2.78%
8.5.1FP3	134	2.62%
6.5.1	120	2.35%
6.5.3	113	2.21%
8.0	110	2.15%
8.5.1FP2	101	1.97%
7.0	98	1.92%
8.5.1FP5	96	1.88%
7.0.3FP1	92	1.80%
7.0.2FP2	88	1.72%
6.5.5	86	1.68%
8.5.1FP4	86	1.68%
6.5	69	1.35%
8.5.1FP1	61	1.19%
7.0.4	55	1.08%
5.0.11	52	1.02%
Other	829	16.21%
WinWebMail (4,522 servers)
Version	Number of Servers	Percent
3.8.0.1	947	20.94%
3.7.6.1	679	15.02%
3.8.1.3	645	14.26%
3.7.7.3	482	10.66%
3.7.3.1	472	10.44%
3.8.1.1	413	9.13%
3.7.1.1	224	4.95%
3.7.5.1	151	3.34%
3.7.7.1	126	2.79%
3.6.3.1	108	2.39%
3.7.0.5	94	2.08%
3.7.0.3	88	1.95%
3.7.0.7	63	1.39%
Other	30	0.66%
CommuniGate Pro (3,632 servers)
Version	Number of Servers	Percent
5.1.16	254	6.99%
4.1.8	195	5.37%
5.3.13	146	4.02%
5.3.12	140	3.85%
5.3.8	125	3.44%
5.2.16	119	3.28%
5.3.10	115	3.17%
4.2.10	110	3.03%
5.4	109	3.00%
5.2.20	109	3.00%
5.3.11	105	2.89%
5.2.19	89	2.45%
5.1.12	82	2.26%
5.3.9	81	2.23%
5.0.14	75	2.06%
5.2.3	73	2.01%
5.2.14	71	1.95%
5.2.12	69	1.90%
5.1.13	59	1.62%
5.2.8	55	1.51%
5.3.7	55	1.51%
5.2.13	51	1.40%
5.3.2	48	1.32%
5.3.5	46	1.27%
5.2.10	43	1.18%
5.2.18	43	1.18%
5.1.14	42	1.16%
5.2.0	40	1.10%
5.0.9	37	1.02%
Other	1,046	28.80%
Kerio (2,876 servers)
Version	Number of Servers	Percent
6.7.3	387	13.46%
6.6.2	322	11.20%
6.7.0	267	9.28%
6.7.2	210	7.30%
6.5.0	198	6.88%
6.5.2	177	6.15%
6.3.1	149	5.18%
6.7.1	149	5.18%
6.4.1	148	5.15%
6.4.0	121	4.21%
6.6.0	98	3.41%
6.5.1	94	3.27%
6.6.1	77	2.68%
6.4.2	64	2.23%
6.3.0	54	1.88%
6.2.2	34	1.18%
6.1.3	32	1.11%
6.2.0	30	1.04%
Other	265	9.21%
XMail (2,496 servers)
Version	Number of Servers	Percent
1.22	594	23.80%
1.25	545	21.83%
1.27	328	13.14%
1.26	321	12.86%
1.24	278	11.14%
1.21	110	4.41%
1.23	71	2.84%
1.20	61	2.44%
1.17	47	1.88%
1.12	37	1.48%
Other	104	4.17%
Merak (2,063 servers)
Version	Number of Servers	Percent
8.0.3	844	40.91%
8.9.1	200	9.69%
8.5.0	139	6.74%
7.5.2	94	4.56%
7.6.4	89	4.31%
7.4.5	88	4.27%
8.3.8	81	3.93%
8.2.13	46	2.23%
7.4.2	32	1.55%
9.0.0	28	1.36%
7.2.0	26	1.26%
8.2.4	25	1.21%
8.3.15	25	1.21%
8.9.0	24	1.16%
7.6.1	24	1.16%
7.0.1	23	1.11%
Other	275	13.33%
Qmail Toaster (1,745 servers)
Version	Number of Servers	Percent
1.3	1,624	93.07%
1.2	91	5.21%
1.0	21	1.20%
Other	9	0.52%
SurgeSMTP (1,290 servers)
Version	Number of Servers	Percent
5.2a-1	357	27.67%
3.9e-1	116	8.99%
4.2d4-4	95	7.36%
5.0e4-4	67	5.19%
3.8k4-4	50	3.88%
4.0u4-4	47	3.64%
4.2d2-2	37	2.87%
5.1c2-2	33	2.56%
5.0e3-3	32	2.48%
4.3e-1	28	2.17%
5.1c-1	26	2.02%
3.8i3-3	25	1.94%
4.3g4-4	24	1.86%
4.3g2-2	23	1.78%
5.3b2-2	20	1.55%
3.7b8-8	19	1.47%
4.2a3-3	18	1.40%
3.6f5-5	18	1.40%
3.9g2-2	16	1.24%
3.9h-18	15	1.16%
3.9c-1	14	1.09%
3.8f3-3	13	1.01%
Other	197	15.27%
ArGoSoft (1,202 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	249	20.72%
1.8 (1.8.9.5)	193	16.06%
1.8 (1.8.9.3)	150	12.48%
1.8 (1.8.9.1)	111	9.23%
1.8 (1.8.8.8)	99	8.24%
1.8 (1.8.8.7)	70	5.82%
1.8 (1.8.9.2)	56	4.66%
1.8 (1.8.9.4)	35	2.91%
1.8 (1.8.8.1)	21	1.75%
1.8 (1.8.8.9)	19	1.58%
1.8 (1.8.9.0)	16	1.33%
1.8 (1.8.6.0)	15	1.25%
1.8 (1.8.8.2)	13	1.08%
Other	155	12.90%
GroupWise (1,043 servers)
Version	Number of Servers	Percent
7.0.3	261	25.02%
8.0.2	168	16.11%
6.5.7	113	10.83%
7.0.2	95	9.11%
8.0.1	73	7.00%
7.0.1	50	4.79%
7.0.4	50	4.79%
6.5.4	46	4.41%
6.5.6	34	3.26%
6.0.4	28	2.68%
8.0.0	27	2.59%
6.5.1	27	2.59%
6.5.5	17	1.63%
7.0	11	1.05%
Other	43	4.12%
Trend Micro (651 servers)
Version	Number of Servers	Percent
5.7	267	41.01%
5.5	168	25.81%
5.18	119	18.28%
7.0	60	9.22%
7.1	16	2.46%
7	8	1.23%
Other	13	2.00%
Post.Office (496 servers)
Version	Number of Servers	Percent
3.5.3	79	15.93%
4.1.0.2	58	11.69%
4.0.1	44	8.87%
4.1.2.4	26	5.24%
3.5.3J	25	5.04%
4.1.1	23	4.64%
3.8.3	21	4.23%
3.9.2.3	15	3.02%
3.9.2	13	2.62%
3.1.2J	13	2.62%
3.9.1	12	2.42%
3.1.2	10	2.02%
4.1.0.3	10	2.02%
4.1.0.4	10	2.02%
4.0.1.1	10	2.02%
3.8.7.4	10	2.02%
4.1	9	1.81%
3.6.2	9	1.81%
3.9.2.1	8	1.61%
3.9.1.3	7	1.41%
3.6.3	7	1.41%
4.0.0.2	7	1.41%
4.0.0.1	6	1.21%
4.1.2.3	6	1.21%
4.1.2.2	6	1.21%
3.9.0	5	1.01%
3.9.1.2	5	1.01%
3.5.2	5	1.01%
Other	37	7.46%
Gordano Messaging Suite (GMS) (487 servers)
Version	Number of Servers	Percent
Other	487	100.00%
MagicMail (385 servers)
Version	Number of Servers	Percent
Other	385	100.00%
Mirapoint (284 servers)
Version	Number of Servers	Percent
3.8.4-GA	29	10.21%
3.10.5-GA	24	8.45%
3.10.8-GA	21	7.39%
3.10.10a-GA	20	7.04%
3.8.3-GA	18	6.34%
4.1.10-GA	15	5.28%
4.1.3-GA	14	4.93%
3.10.7-GA	14	4.93%
3.10.9-GA	14	4.93%
4.1.9-GA	13	4.58%
4.2.3-GA	11	3.87%
4.1.8-GA	10	3.52%
3.10.4-GA	9	3.17%
3.10.6-GA	9	3.17%
3.10.3-GA	8	2.82%
3.8.7a	7	2.46%
3.8.5-GA	6	2.11%
3.8.2-GA	6	2.11%
4.1.4-GA	6	2.11%
3.8.6-GA	6	2.11%
3.7.3a-GA	4	1.41%
3.7.5a-GA	3	1.06%
4.1.5-GA	3	1.06%
Other	14	4.93%
VisNetic (243 servers)
Version	Number of Servers	Percent
9.3.2.0	83	34.16%
9.1.4.1	35	14.40%
5.8.6.6	17	7.00%
8.5.0.8	13	5.35%
5.5.8.3	10	4.12%
8.0.3.1	8	3.29%
7.6.1.0	7	2.88%
6.2.2.0	6	2.47%
8.0.3	6	2.47%
8.3.5.0	5	2.06%
5.3.5.0	5	2.06%
9.1.4.0	5	2.06%
5.0.2.3	5	2.06%
8.0.3.0	5	2.06%
5.0.2.1	4	1.65%
8.3.6	3	1.23%
7.2.4.0	3	1.23%
5.4.5.4	3	1.23%
7.2.4.1	3	1.23%
Other	17	7.00%
InterScan VirusWall (228 servers)
Version	Number of Servers	Percent
Other	228	100.00%
NetIQ MailMarshal (110 servers)
Version	Number of Servers	Percent
6.0.3.8	75	68.18%
6.1.3.15	10	9.09%
5.5.6.7	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	5	4.55%
Interscan (88 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	16	18.18%
3.81-Build_1022	11	12.50%
3.53 (build 2017)	10	11.36%
3.55 (build 1029)	9	10.23%
3.8-Build_3013	7	7.95%
3.81-Build_1084	6	6.82%
3.53 (build 1493)	5	5.68%
3.55 (build 1020)	5	5.68%
3.52 (build 1375)	4	4.55%
3.53 (build 2011)	3	3.41%
3.53 (build 2013)	2	2.27%
3.8-Build_1080	2	2.27%
3.53 (build 1494)	1	1.14%
3.81-Build_1055	1	1.14%
3.51 (build 1321)	1	1.14%
3.55 (build 2003)	1	1.14%
3.6-Build_1246	1	1.14%
3.81-Build_1032	1	1.14%
3.8-Build_3045	1	1.14%
3.6-Build_1207	1	1.14%
Other	0	0.00%
Mercury (80 servers)
Version	Number of Servers	Percent
1.48	43	53.75%
3.32	21	26.25%
3.21c	5	6.25%
3.21	2	2.50%
3.01a	2	2.50%
1.47	2	2.50%
3.30	2	2.50%
1.44	1	1.25%
3.31	1	1.25%
1.49	1	1.25%
Other	0	0.00%
WebSTAR V (59 servers)
Version	Number of Servers	Percent
5.4.1	22	37.29%
5.4.0	13	22.03%
5.3.4	12	20.34%
5.3.3	6	10.17%
5.3.2	4	6.78%
5.3.0	1	1.69%
5.3.1	1	1.69%
Other	0	0.00%
Neon Mail Server (52 servers)
Version	Number of Servers	Percent
3.1.3	13	25.00%
3.0.7	12	23.08%
3.1.2	6	11.54%
3.0.9	6	11.54%
3.1.4	5	9.62%
3.1.0	4	7.69%
3.0.6	2	3.85%
3.1.1	2	3.85%
3.1.5	2	3.85%
Other	0	0.00%
OpenVMS (24 servers)
Version	Number of Servers	Percent
8.3	11	45.83%
7.3	7	29.17%
8.4	2	8.33%
8.2	2	8.33%
6.1	1	4.17%
7.2	1	4.17%
Other	0	0.00%
MessageWall (23 servers)
Version	Number of Servers	Percent
1.0.8	22	95.65%
1.0.6	1	4.35%
Other	0	0.00%
ModusMail (22 servers)
Version	Number of Servers	Percent
4.35.477.0	9	40.91%
4.35.480.0	3	13.64%
4.1.361.21	2	9.09%
4.2.425.22	1	4.55%
3.2.315.0	1	4.55%
4.0.340.3	1	4.55%
3.1.293.1	1	4.55%
4.3.459.0	1	4.55%
4.35.477.8	1	4.55%
3.1.302.0	1	4.55%
4.35.480.11	1	4.55%
Other	0	0.00%
WebSTAR (21 servers)
Version	Number of Servers	Percent
Other	21	100.00%
MAILsweeper (11 servers)
Version	Number of Servers	Percent
4.3.17.0	3	27.27%
4.3.20.0	2	18.18%
4.3.19.0	2	18.18%
4.3.14.0	2	18.18%
4.3.1.0	1	9.09%
4.3.6.0	1	9.09%
Other	0	0.00%
OpenSMTPD (5 servers)
Version	Number of Servers	Percent
Other	5	100.00%