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	2,224,469	100.0%
Number of Servers that didn't respond	355,210	15.97%
Server didn't open socket	343,018	15.42%
Server didn't provide banner	12,192	0.55%
Server provided banner	1,869,259	84.03%
Server banner identifies software in use	1,018,966	45.81%

As indicated by the above table, of the 2,224,469 servers queried, only 1,018,966 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	412,901	40.52%
Postfix	228,306	22.41%
Microsoft	145,680	14.30%
Sendmail	138,240	13.57%
MailEnable	32,785	3.22%
MDaemon	21,872	2.15%
IMail	10,696	1.05%
Lotus Domino	5,002	0.49%
WinWebMail	4,439	0.44%
CommuniGate Pro	3,542	0.35%
Kerio	2,771	0.27%
XMail	2,457	0.24%
Merak	2,008	0.20%
Qmail Toaster	1,743	0.17%
SurgeSMTP	1,260	0.12%
ArGoSoft	1,155	0.11%
GroupWise	977	0.10%
Trend Micro	621	0.06%
Gordano Messaging Suite (GMS)	474	0.05%
Post.Office	449	0.04%
MagicMail	384	0.04%
Mirapoint	278	0.03%
VisNetic	242	0.02%
InterScan VirusWall	209	0.02%
NetIQ MailMarshal	105	0.01%
Interscan	84	0.01%
Mercury	75	0.01%
WebSTAR V	57	0.01%
Neon Mail Server	49	0.00%
OpenVMS	24	0.00%
MessageWall	23	0.00%
WebSTAR	23	0.00%
ModusMail	20	0.00%
MAILsweeper	11	0.00%
OpenSMTPD	4	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (412,901 servers)
Version	Number of Servers	Percent
4.69	351,624	85.16%
4.72	19,933	4.83%
4.67	11,316	2.74%
4.63	6,192	1.50%
4.75	5,473	1.33%
4.71	4,439	1.08%
Other	13,924	3.37%
Postfix (228,306 servers)
Version	Number of Servers	Percent
Other	228,306	100.00%
Microsoft (145,680 servers)
Version	Number of Servers	Percent
6.0.3790.4675	107,876	74.05%
6.0.3790.3959	24,772	17.00%
6.0.3790.1830	6,594	4.53%
5.0.2195.7381	1,980	1.36%
Other	4,458	3.06%
Sendmail (138,240 servers)
Version	Number of Servers	Percent
8.13.8	31,067	22.47%
8.13.1	25,277	18.28%
8.14.3	18,728	13.55%
8.14.4	18,272	13.22%
8.12.11.20060308	6,527	4.72%
8.13.6.20060614	5,040	3.65%
8.14.2	4,048	2.93%
8.11.6	3,685	2.67%
8.12.10	3,608	2.61%
8.13.6	3,129	2.26%
8.14.1	2,910	2.11%
8.12.11.20060614	2,733	1.98%
8.12.11	2,138	1.55%
8.13.7	2,106	1.52%
8.13.4	2,038	1.47%
8.12.8	1,744	1.26%
Other	5,190	3.75%
MailEnable (32,785 servers)
Version	Number of Servers	Percent
1.986--	10,660	32.51%
1.981--	2,349	7.16%
4.26--	2,333	7.12%
1.983--	1,507	4.60%
3.62--	1,003	3.06%
0-3.63-	922	2.81%
5.10--	599	1.83%
0-4.26-	597	1.82%
4.22--	597	1.82%
4.23--	557	1.70%
0-2.53-	436	1.33%
0-1.87-	424	1.29%
1.96--	421	1.28%
1.95--	403	1.23%
4.14--	391	1.19%
--3.63	366	1.12%
0-5.10-	360	1.10%
Other	8,860	27.02%
MDaemon (21,872 servers)
Version	Number of Servers	Percent
11.0.3	3,982	18.21%
12.0.1	1,869	8.55%
12.0.2	1,474	6.74%
10.1.2	1,232	5.63%
11.0.0	1,130	5.17%
10.0.0	1,102	5.04%
10.1.1	918	4.20%
9.6.1	697	3.19%
12.0.0	660	3.02%
9.6.6	643	2.94%
10.1.0	549	2.51%
9.5.2	440	2.01%
10.0.5	433	1.98%
9.6.5	431	1.97%
10.0.2	381	1.74%
9.6.2	368	1.68%
9.5.1	359	1.64%
9.5.6	344	1.57%
9.6.4	333	1.52%
10.0.4	331	1.51%
8.1.3	314	1.44%
11.0.2	301	1.38%
9.0.4	294	1.34%
11.0.1	227	1.04%
Other	3,060	13.99%
IMail (10,696 servers)
Version	Number of Servers	Percent
8.22	2,075	19.40%
11.03	832	7.78%
8.15	792	7.40%
11.02	791	7.40%
9.23	693	6.48%
11.01	540	5.05%
8.05	489	4.57%
9.20	458	4.28%
9.10	440	4.11%
10.02	381	3.56%
11.5	352	3.29%
11.0	328	3.07%
7.07	278	2.60%
9.21	273	2.55%
7.15	251	2.35%
6.06	209	1.95%
8.00	206	1.93%
10.01	151	1.41%
8.04	137	1.28%
Other	1,020	9.54%
Lotus Domino (5,002 servers)
Version	Number of Servers	Percent
8.5.2	582	11.64%
8.5.1	424	8.48%
8.5.2FP1	341	6.82%
7.0.2	286	5.72%
8.5	285	5.70%
8.5.2FP2	284	5.68%
7.0.3	170	3.40%
7.0.1	147	2.94%
8.0.2	143	2.86%
8.0.1	139	2.78%
8.5.1FP3	136	2.72%
6.5.4	130	2.60%
6.5.1	116	2.32%
6.5.3	109	2.18%
8.0	100	2.00%
8.5.1FP5	94	1.88%
7.0	93	1.86%
8.5.1FP2	86	1.72%
6.5.5	82	1.64%
7.0.3FP1	81	1.62%
7.0.2FP2	78	1.56%
8.5.1FP4	73	1.46%
6.5	69	1.38%
5.0.11	55	1.10%
8.5.1FP1	53	1.06%
Other	846	16.91%
WinWebMail (4,439 servers)
Version	Number of Servers	Percent
3.8.0.1	894	20.14%
3.8.1.3	711	16.02%
3.7.6.1	657	14.80%
3.7.3.1	451	10.16%
3.7.7.3	444	10.00%
3.8.1.1	412	9.28%
3.7.1.1	216	4.87%
3.7.5.1	156	3.51%
3.7.7.1	119	2.68%
3.6.3.1	115	2.59%
3.7.0.5	93	2.10%
3.7.0.3	81	1.82%
3.7.0.7	61	1.37%
Other	29	0.65%
CommuniGate Pro (3,542 servers)
Version	Number of Servers	Percent
5.1.16	262	7.40%
5.3.13	193	5.45%
4.1.8	192	5.42%
5.4	131	3.70%
5.3.12	127	3.59%
5.2.16	116	3.27%
5.3.8	115	3.25%
5.2.20	108	3.05%
4.2.10	102	2.88%
5.3.10	102	2.88%
5.2.19	90	2.54%
5.3.11	85	2.40%
5.1.12	79	2.23%
5.3.9	79	2.23%
5.0.14	76	2.15%
5.2.3	71	2.00%
5.2.14	67	1.89%
5.2.12	65	1.84%
5.2.8	57	1.61%
5.1.13	52	1.47%
5.3.7	51	1.44%
5.2.13	49	1.38%
5.3.2	44	1.24%
5.3.5	44	1.24%
5.1.14	42	1.19%
5.2.10	39	1.10%
5.2.18	39	1.10%
5.2.0	37	1.04%
Other	1,028	29.02%
Kerio (2,771 servers)
Version	Number of Servers	Percent
6.7.3	369	13.32%
6.6.2	306	11.04%
6.7.0	245	8.84%
6.7.2	201	7.25%
6.5.0	194	7.00%
6.5.2	175	6.32%
6.3.1	147	5.30%
6.7.1	146	5.27%
6.4.1	141	5.09%
6.4.0	110	3.97%
6.6.0	97	3.50%
6.5.1	96	3.46%
6.6.1	74	2.67%
6.4.2	65	2.35%
6.3.0	56	2.02%
6.2.2	33	1.19%
6.1.3	29	1.05%
6.2.0	28	1.01%
6.1.0	28	1.01%
Other	231	8.34%
XMail (2,457 servers)
Version	Number of Servers	Percent
1.22	582	23.69%
1.25	536	21.82%
1.27	334	13.59%
1.26	317	12.90%
1.24	275	11.19%
1.21	107	4.35%
1.23	71	2.89%
1.20	50	2.04%
1.17	43	1.75%
1.12	38	1.55%
Other	104	4.23%
Merak (2,008 servers)
Version	Number of Servers	Percent
8.0.3	818	40.74%
8.9.1	200	9.96%
8.5.0	138	6.87%
7.5.2	98	4.88%
8.3.8	87	4.33%
7.6.4	82	4.08%
7.4.5	78	3.88%
8.2.13	46	2.29%
7.4.2	32	1.59%
9.0.0	30	1.49%
7.6.1	27	1.34%
8.3.15	24	1.20%
8.2.4	23	1.15%
7.2.0	23	1.15%
7.0.1	21	1.05%
8.9.0	21	1.05%
Other	260	12.95%
Qmail Toaster (1,743 servers)
Version	Number of Servers	Percent
1.3	1,625	93.23%
1.2	85	4.88%
1.0	23	1.32%
Other	10	0.57%
SurgeSMTP (1,260 servers)
Version	Number of Servers	Percent
5.2a-1	373	29.60%
3.9e-1	113	8.97%
4.2d4-4	93	7.38%
5.0e4-4	59	4.68%
3.8k4-4	55	4.37%
4.0u4-4	46	3.65%
4.2d2-2	32	2.54%
5.0e3-3	27	2.14%
4.3g4-4	26	2.06%
5.3b2-2	26	2.06%
5.1c2-2	26	2.06%
4.3e-1	24	1.90%
3.8i3-3	23	1.83%
4.3g2-2	23	1.83%
5.1c-1	20	1.59%
3.7b8-8	17	1.35%
3.9c-1	16	1.27%
3.6f5-5	16	1.27%
3.9g2-2	15	1.19%
3.9h-18	15	1.19%
4.2a3-3	15	1.19%
Other	200	15.87%
ArGoSoft (1,155 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	248	21.47%
1.8 (1.8.9.5)	177	15.32%
1.8 (1.8.9.3)	139	12.03%
1.8 (1.8.9.1)	109	9.44%
1.8 (1.8.8.8)	91	7.88%
1.8 (1.8.8.7)	68	5.89%
1.8 (1.8.9.2)	51	4.42%
1.8 (1.8.9.4)	34	2.94%
1.8 (1.8.8.1)	22	1.90%
1.8 (1.8.6.0)	19	1.65%
1.8 (1.8.8.9)	18	1.56%
1.8 (1.8.9.0)	16	1.39%
1.8 (1.8.8.2)	13	1.13%
Other	150	12.99%
GroupWise (977 servers)
Version	Number of Servers	Percent
7.0.3	247	25.28%
8.0.2	167	17.09%
6.5.7	105	10.75%
7.0.2	90	9.21%
8.0.1	70	7.16%
7.0.4	47	4.81%
7.0.1	41	4.20%
6.5.4	38	3.89%
6.5.6	31	3.17%
6.5.1	27	2.76%
6.0.4	26	2.66%
8.0.0	24	2.46%
6.5.5	13	1.33%
7.0	11	1.13%
Other	40	4.09%
Trend Micro (621 servers)
Version	Number of Servers	Percent
5.7	256	41.22%
5.5	161	25.93%
5.18	110	17.71%
7.0	57	9.18%
7.1	16	2.58%
7	8	1.29%
Other	13	2.09%
Gordano Messaging Suite (GMS) (474 servers)
Version	Number of Servers	Percent
Other	474	100.00%
Post.Office (449 servers)
Version	Number of Servers	Percent
3.5.3	73	16.26%
4.1.0.2	51	11.36%
4.0.1	40	8.91%
4.1.2.4	24	5.35%
3.5.3J	23	5.12%
3.8.3	20	4.45%
4.1.1	17	3.79%
3.9.2.3	13	2.90%
3.9.2	11	2.45%
4.0.1.1	11	2.45%
3.9.1	11	2.45%
3.1.2J	11	2.45%
3.1.2	10	2.23%
4.1.0.4	10	2.23%
4.1.0.3	9	2.00%
3.8.7.4	9	2.00%
3.6.2	9	2.00%
4.1	8	1.78%
4.0.0.2	8	1.78%
3.9.1.3	6	1.34%
4.1.2.3	6	1.34%
3.9.2.1	6	1.34%
3.5.2	6	1.34%
4.1.2.2	5	1.11%
Other	52	11.58%
MagicMail (384 servers)
Version	Number of Servers	Percent
Other	384	100.00%
Mirapoint (278 servers)
Version	Number of Servers	Percent
3.8.4-GA	28	10.07%
3.10.5-GA	24	8.63%
3.10.10a-GA	21	7.55%
3.10.8-GA	20	7.19%
3.8.3-GA	18	6.47%
4.1.9-GA	15	5.40%
4.1.10-GA	14	5.04%
3.10.9-GA	14	5.04%
4.1.3-GA	13	4.68%
3.10.7-GA	13	4.68%
4.2.3-GA	12	4.32%
3.10.4-GA	10	3.60%
4.1.8-GA	9	3.24%
3.8.5-GA	7	2.52%
3.10.6-GA	7	2.52%
3.8.7a	7	2.52%
3.10.3-GA	6	2.16%
4.1.4-GA	6	2.16%
3.8.6-GA	5	1.80%
3.8.2-GA	5	1.80%
3.7.3a-GA	4	1.44%
3.7.5a-GA	3	1.08%
4.1.5-GA	3	1.08%
Other	14	5.04%
VisNetic (242 servers)
Version	Number of Servers	Percent
9.3.2.0	84	34.71%
9.1.4.1	35	14.46%
5.8.6.6	17	7.02%
8.5.0.8	12	4.96%
5.5.8.3	10	4.13%
8.0.3.1	9	3.72%
7.6.1.0	7	2.89%
6.2.2.0	6	2.48%
8.0.3	6	2.48%
8.3.5.0	5	2.07%
5.3.5.0	5	2.07%
9.1.4.0	5	2.07%
5.0.2.3	5	2.07%
8.0.3.0	5	2.07%
5.0.2.1	4	1.65%
7.2.4.1	4	1.65%
Other	23	9.50%
InterScan VirusWall (209 servers)
Version	Number of Servers	Percent
Other	209	100.00%
NetIQ MailMarshal (105 servers)
Version	Number of Servers	Percent
6.0.3.8	73	69.52%
6.1.3.15	10	9.52%
5.5.6.7	8	7.62%
5.5.4.16	5	4.76%
5.5.6.6	3	2.86%
Other	6	5.71%
Interscan (84 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	14	16.67%
3.81-Build_1022	13	15.48%
3.53 (build 2017)	9	10.71%
3.55 (build 1029)	9	10.71%
3.81-Build_1084	6	7.14%
3.53 (build 1493)	5	5.95%
3.55 (build 1020)	5	5.95%
3.8-Build_3013	4	4.76%
3.52 (build 1375)	4	4.76%
3.53 (build 2011)	3	3.57%
3.53 (build 2013)	2	2.38%
3.8-Build_1080	2	2.38%
3.53 (build 1494)	1	1.19%
3.81-Build_1055	1	1.19%
3.51 (build 1321)	1	1.19%
3.55 (build 2003)	1	1.19%
3.6-Build_1246	1	1.19%
3.81-Build_1032	1	1.19%
3.8-Build_3045	1	1.19%
3.6-Build_1207	1	1.19%
Other	0	0.00%
Mercury (75 servers)
Version	Number of Servers	Percent
1.48	41	54.67%
3.32	19	25.33%
3.21c	4	5.33%
1.47	3	4.00%
3.21	2	2.67%
3.30	2	2.67%
1.44	1	1.33%
3.01a	1	1.33%
3.31	1	1.33%
1.49	1	1.33%
Other	0	0.00%
WebSTAR V (57 servers)
Version	Number of Servers	Percent
5.4.1	22	38.60%
5.3.4	12	21.05%
5.4.0	11	19.30%
5.3.2	5	8.77%
5.3.3	4	7.02%
5.3.1	2	3.51%
5.3.0	1	1.75%
Other	0	0.00%
Neon Mail Server (49 servers)
Version	Number of Servers	Percent
3.1.3	12	24.49%
3.0.7	12	24.49%
3.0.9	6	12.24%
3.1.4	5	10.20%
3.1.2	4	8.16%
3.1.0	4	8.16%
3.0.6	2	4.08%
3.1.1	2	4.08%
3.1.5	2	4.08%
Other	0	0.00%
OpenVMS (24 servers)
Version	Number of Servers	Percent
8.3	11	45.83%
7.3	8	33.33%
8.4	2	8.33%
8.2	2	8.33%
6.1	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%
WebSTAR (23 servers)
Version	Number of Servers	Percent
Other	23	100.00%
ModusMail (20 servers)
Version	Number of Servers	Percent
4.35.477.0	7	35.00%
4.35.480.0	3	15.00%
4.1.361.21	2	10.00%
4.2.425.22	1	5.00%
3.2.315.0	1	5.00%
4.0.340.3	1	5.00%
3.1.293.1	1	5.00%
4.3.459.0	1	5.00%
4.35.477.8	1	5.00%
3.1.302.0	1	5.00%
4.35.480.11	1	5.00%
Other	0	0.00%
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 (4 servers)
Version	Number of Servers	Percent
Other	4	100.00%