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	2,010,106	100.0%
Number of Servers that didn't respond	355,213	17.67%
Server didn't open socket	347,590	17.29%
Server didn't provide banner	7,623	0.38%
Server provided banner	1,654,893	82.33%
Server banner identifies software in use	1,007,864	50.14%

As indicated by the above table, of the 2,010,106 servers queried, only 1,007,864 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	561,833	55.74%
Postfix	333,400	33.08%
Sendmail	52,456	5.20%
MailEnable	23,648	2.35%
MDaemon	13,440	1.33%
Microsoft	11,881	1.18%
IMail	2,293	0.23%
CommuniGate Pro	1,893	0.19%
Lotus Domino	1,169	0.12%
WinWebMail	1,087	0.11%
XMail	1,086	0.11%
Qmail Toaster	818	0.08%
SurgeSMTP	693	0.07%
Kerio	488	0.05%
Merak	307	0.03%
OpenSMTPD	284	0.03%
MagicMail	263	0.03%
ArGoSoft	222	0.02%
Post.Office	164	0.02%
Gordano Messaging Suite (GMS)	123	0.01%
GroupWise	104	0.01%
Trend Micro	69	0.01%
InterScan VirusWall	31	0.00%
VisNetic	30	0.00%
Mirapoint	25	0.00%
OpenVMS	15	0.00%
Mercury	9	0.00%
ModusMail	9	0.00%
WebSTAR V	7	0.00%
Interscan	5	0.00%
Neon Mail Server	4	0.00%
MessageWall	4	0.00%
WebSTAR	2	0.00%
MAILsweeper	1	0.00%
NetIQ MailMarshal	1	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (561,833 servers)
Version	Number of Servers	Percent
4.87	411,796	73.30%
4.86	46,781	8.33%
4.84	20,783	3.70%
4.88	13,854	2.47%
4.80	12,178	2.17%
4.72	9,497	1.69%
4.85	9,455	1.68%
4.76	8,135	1.45%
4.82	7,778	1.38%
4.80.1	6,138	1.09%
Other	15,438	2.75%
Postfix (333,400 servers)
Version	Number of Servers	Percent
Other	333,400	100.00%
Sendmail (52,456 servers)
Version	Number of Servers	Percent
8.14.5	12,503	23.84%
8.14.4	11,781	22.46%
8.13.8	9,264	17.66%
8.13.1	5,582	10.64%
8.14.3	2,623	5.00%
8.15.2	2,109	4.02%
8.14.9	1,504	2.87%
8.14.7	1,480	2.82%
8.12.11.20060308	872	1.66%
8.14.2	542	1.03%
Other	4,196	8.00%
MailEnable (23,648 servers)
Version	Number of Servers	Percent
9.00--	3,029	12.81%
8.60--	1,525	6.45%
8.53--	1,172	4.96%
6.5--	1,074	4.54%
1.986--	870	3.68%
8.51--	811	3.43%
8.04--	591	2.50%
8.60-8.60-	477	2.02%
5.10--	470	1.99%
8.50--	437	1.85%
8.00--	379	1.60%
9.53--	367	1.55%
6.0--	326	1.38%
7.06--	314	1.33%
4.26--	311	1.32%
9.50--	290	1.23%
9.12--	269	1.14%
Other	10,936	46.24%
MDaemon (13,440 servers)
Version	Number of Servers	Percent
16.5.2	1,850	13.76%
16.5.1	937	6.97%
16.0.4	887	6.60%
13.5.1	582	4.33%
11.0.3	517	3.85%
11.0.0	517	3.85%
13.0.5	510	3.79%
13.0.4	506	3.76%
13.6.3	389	2.89%
15.0.3	335	2.49%
16.5.0	315	2.34%
12.5.6	273	2.03%
15.5.3	263	1.96%
12.5.4	229	1.70%
14.5.2	223	1.66%
10.0.0	219	1.63%
16.0.1	214	1.59%
16.0.2	208	1.55%
10.1.2	198	1.47%
15.5.2	137	1.02%
10.1.0	136	1.01%
Other	3,995	29.72%
Microsoft (11,881 servers)
Version	Number of Servers	Percent
6.0.3790.4675	7,538	63.45%
7.5.7601.17514	1,255	10.56%
6.0.3790.3959	899	7.57%
8.5.9600.16384	703	5.92%
6.0.3790.1830	246	2.07%
7.0.6002.18264	241	2.03%
8.0.9200.16384	198	1.67%
5.0.2195.5329	179	1.51%
5.0.2195.7381	137	1.15%
Other	485	4.08%
IMail (2,293 servers)
Version	Number of Servers	Percent
12.5.5.115	336	14.65%
8.22	190	8.29%
12.4.1.15	186	8.11%
12.5.4.146	172	7.50%
12.5.3.93	170	7.41%
9.23	156	6.80%
8.15	124	5.41%
12.3.0.100	108	4.71%
8.05	84	3.66%
11.03	67	2.92%
11.5	66	2.88%
7.07	36	1.57%
10.02	36	1.57%
12.5.1.60	35	1.53%
7.15	34	1.48%
11.02	33	1.44%
12.5.3.99	31	1.35%
12.2.0.235	27	1.18%
12.1.0.270	26	1.13%
8.00	24	1.05%
12.5.2.62	24	1.05%
Other	328	14.30%
CommuniGate Pro (1,893 servers)
Version	Number of Servers	Percent
5.1.16	178	9.40%
6.1.11	107	5.65%
6.1.13	85	4.49%
6.1.10	79	4.17%
5.4.11	78	4.12%
6.1.12	73	3.86%
6.0.11	71	3.75%
5.2.20	69	3.65%
6.1.14	60	3.17%
6.0.9	51	2.69%
6.1.2	50	2.64%
5.3.13	43	2.27%
6.1.8	41	2.17%
5.2.3	37	1.95%
5.0.14	36	1.90%
6.1.5	31	1.64%
4.1.8	31	1.64%
5.3.15	29	1.53%
6.0.10	28	1.48%
6.1.7	25	1.32%
6.1.4	22	1.16%
5.1.12	22	1.16%
6.1.9	21	1.11%
5.2.16	21	1.11%
5.4.5	20	1.06%
5.4.4	20	1.06%
Other	565	29.85%
Lotus Domino (1,169 servers)
Version	Number of Servers	Percent
8.5.3FP6	216	18.48%
8.5.3	162	13.86%
8.5.2	51	4.36%
8.5.1	45	3.85%
7.0.2	42	3.59%
8.5	40	3.42%
8.5.3FP4	35	2.99%
8.5.2FP4	30	2.57%
8.5.2FP3	30	2.57%
8.5.3FP2	28	2.40%
8.0.1	26	2.22%
8.5.3FP1	26	2.22%
8.5.3FP3	25	2.14%
8.5.3FP5	24	2.05%
7.0.3	23	1.97%
8.0	20	1.71%
8.5.2FP2	19	1.63%
7.0.1	18	1.54%
8.5.1FP5	18	1.54%
7.0	17	1.45%
7.0.4	16	1.37%
6.5.1	15	1.28%
6.5.4	13	1.11%
6.5.5	12	1.03%
8.0.2	12	1.03%
Other	206	17.62%
WinWebMail (1,087 servers)
Version	Number of Servers	Percent
3.9.0.7	281	25.85%
3.8.1.3	166	15.27%
3.8.0.1	77	7.08%
3.7.6.1	76	6.99%
3.9.0.1	72	6.62%
3.8.1.5	56	5.15%
3.8.1.1	46	4.23%
3.7.3.1	45	4.14%
3.8.5.1	45	4.14%
3.8.6.1	42	3.86%
3.7.7.3	39	3.59%
3.7.1.1	24	2.21%
3.8.2.1	23	2.12%
3.8.3.1	20	1.84%
3.8.3.3	12	1.10%
3.7.0.5	11	1.01%
3.9.0.5	11	1.01%
Other	41	3.77%
XMail (1,086 servers)
Version	Number of Servers	Percent
1.27	460	42.36%
1.22	330	30.39%
1.25	85	7.83%
1.26	82	7.55%
1.24	48	4.42%
1.21	24	2.21%
1.23	16	1.47%
Other	41	3.78%
Qmail Toaster (818 servers)
Version	Number of Servers	Percent
1.3	737	90.10%
1.03	35	4.28%
1.2	15	1.83%
1.03.6	9	1.10%
Other	22	2.69%
SurgeSMTP (693 servers)
Version	Number of Servers	Percent
7.1e-1	157	22.66%
7.2a-1	105	15.15%
6.5a2-2	54	7.79%
7.2e-2	46	6.64%
6.9c-1	38	5.48%
6.7c-1	29	4.18%
6.5a-1	28	4.04%
7.0c2-2	21	3.03%
3.9e-1	18	2.60%
5.2a-1	16	2.31%
6.1c-1	15	2.16%
6.3c2-2	13	1.88%
4.0u4-4	11	1.59%
6.4a-1	10	1.44%
3.8k4-4	9	1.30%
7.1f-32	7	1.01%
5.3h2-2	7	1.01%
Other	109	15.73%
Kerio (488 servers)
Version	Number of Servers	Percent
6.7.3	103	21.11%
6.7.0	53	10.86%
6.6.2	42	8.61%
6.5.2	40	8.20%
6.5.0	30	6.15%
6.4.1	27	5.53%
6.7.2	27	5.53%
6.6.1	23	4.71%
6.7.1	22	4.51%
6.3.0	17	3.48%
6.3.1	17	3.48%
6.4.0	14	2.87%
6.5.1	14	2.87%
6.1.3	9	1.84%
6.6.0	8	1.64%
6.2.0	6	1.23%
5.7.9	6	1.23%
6.4.2	5	1.02%
6.1.0	5	1.02%
Other	20	4.10%
Merak (307 servers)
Version	Number of Servers	Percent
8.0.3	91	29.64%
8.9.1	42	13.68%
8.5.0	27	8.79%
7.4.5	19	6.19%
7.5.2	18	5.86%
8.3.8	13	4.23%
7.6.4	13	4.23%
7.6.1	12	3.91%
7.4.2	7	2.28%
8.3.15	7	2.28%
7.2.0	7	2.28%
7.0.1	4	1.30%
8.9.0	4	1.30%
6.0.8	4	1.30%
Other	39	12.70%
OpenSMTPD (284 servers)
Version	Number of Servers	Percent
Other	284	100.00%
MagicMail (263 servers)
Version	Number of Servers	Percent
Other	263	100.00%
ArGoSoft (222 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	76	34.23%
1.8 (1.8.9.5)	27	12.16%
1.8 (1.8.9.1)	24	10.81%
1.8 (1.8.9.3)	22	9.91%
1.8 (1.8.8.8)	10	4.50%
1.8 (1.8.8.7)	8	3.60%
1.8 (1.8.7.3)	6	2.70%
1.8 (1.8.9.2)	6	2.70%
1.8 (1.8.6.0)	6	2.70%
1.8 (1.8.9.4)	4	1.80%
1.8 (1.8.8.9)	4	1.80%
Other	29	13.06%
Post.Office (164 servers)
Version	Number of Servers	Percent
4.2.2	34	20.73%
4.3	29	17.68%
4.1.2.4	21	12.80%
3.5.3	18	10.98%
4.2.1.3	8	4.88%
3.9.2.3	5	3.05%
3.9.2	4	2.44%
4.0.1	4	2.44%
4.1.1	4	2.44%
4.2.1.1	4	2.44%
3.1.2	4	2.44%
4.1.2.3	3	1.83%
3.8.7.4	3	1.83%
3.5.1	3	1.83%
3.5.4	2	1.22%
4.1.0.3	2	1.22%
4.1.0.2	2	1.22%
3.5.3J	2	1.22%
Other	12	7.32%
Gordano Messaging Suite (GMS) (123 servers)
Version	Number of Servers	Percent
Other	123	100.00%
GroupWise (104 servers)
Version	Number of Servers	Percent
14.2.1	29	27.88%
14.2.0	15	14.42%
14.0.1	8	7.69%
14.0.0	7	6.73%
6.5.7	6	5.77%
14.0.2	6	5.77%
7.0.4	4	3.85%
12.0.4	4	3.85%
7.0.3	4	3.85%
8.0.3	3	2.88%
6.0.3	3	2.88%
7.0.2	2	1.92%
12.0.1	2	1.92%
6.0.2	2	1.92%
Other	9	8.65%
Trend Micro (69 servers)
Version	Number of Servers	Percent
5.7	26	37.68%
5.18	12	17.39%
5.5	12	17.39%
7.0	7	10.14%
7.5	4	5.80%
7.1	2	2.90%
3.53	2	2.90%
8.5	1	1.45%
8.5.2	1	1.45%
9.0	1	1.45%
8	1	1.45%
Other	0	0.00%
InterScan VirusWall (31 servers)
Version	Number of Servers	Percent
Other	31	100.00%
VisNetic (30 servers)
Version	Number of Servers	Percent
9.3.2.0	10	33.33%
5.8.6.6	2	6.67%
5.0.2.3	2	6.67%
6.2.2.0	2	6.67%
9.1.4.1	2	6.67%
8.0.3	1	3.33%
7.2.4.0	1	3.33%
8.3.0.1	1	3.33%
9.1.4.0	1	3.33%
8.5.0.5	1	3.33%
5.5.8.3	1	3.33%
8.0.3.1	1	3.33%
7.6.1.0	1	3.33%
5.3.5.0	1	3.33%
5.0.2.0	1	3.33%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	3.33%
8.5.0.8	1	3.33%
Other	0	0.00%
Mirapoint (25 servers)
Version	Number of Servers	Percent
4.4.3-GA	5	20.00%
4.4.5-GA	4	16.00%
4.4.2a-FCS	3	12.00%
4.3.5-GA	3	12.00%
4.4.4-GA	2	8.00%
4.4.7-GA	2	8.00%
4.1.9-GA	1	4.00%
4.4.5a-GA	1	4.00%
4.3.6-GA	1	4.00%
3.10.10a-GA	1	4.00%
3.7.5a-GA	1	4.00%
4.4.6-GA	1	4.00%
Other	0	0.00%
OpenVMS (15 servers)
Version	Number of Servers	Percent
8.4	5	33.33%
7.3	5	33.33%
8.3	4	26.67%
8.2	1	6.67%
Other	0	0.00%
Mercury (9 servers)
Version	Number of Servers	Percent
3.32	4	44.44%
1.48	3	33.33%
3.21	1	11.11%
4.x	1	11.11%
Other	0	0.00%
ModusMail (9 servers)
Version	Number of Servers	Percent
4.35.477.0	5	55.56%
4.1.361.21	2	22.22%
3.2.315.0	1	11.11%
4.35.477.8	1	11.11%
Other	0	0.00%
WebSTAR V (7 servers)
Version	Number of Servers	Percent
5.4.1	4	57.14%
5.4.0	1	14.29%
5.3.2	1	14.29%
5.3.4	1	14.29%
Other	0	0.00%
Interscan (5 servers)
Version	Number of Servers	Percent
3.81-Build_1084	1	20.00%
3.5 (build 1294)	1	20.00%
3.8-Build_3013	1	20.00%
3.8-Build_1080	1	20.00%
3.81-Build_1022	1	20.00%
Other	0	0.00%
Neon Mail Server (4 servers)
Version	Number of Servers	Percent
3.1.0	2	50.00%
3.1.2	1	25.00%
3.0.7	1	25.00%
Other	0	0.00%
MessageWall (4 servers)
Version	Number of Servers	Percent
1.0.8	4	100.00%
Other	0	0.00%
WebSTAR (2 servers)
Version	Number of Servers	Percent
Other	2	100.00%
MAILsweeper (1 servers)
Version	Number of Servers	Percent
4.3.20.0	1	100.00%
Other	0	0.00%
NetIQ MailMarshal (1 servers)
Version	Number of Servers	Percent
5.5.6.7	1	100.00%
Other	0	0.00%