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	2,368,333	100.0%
Number of Servers that didn't respond	398,543	16.83%
Server didn't open socket	389,772	16.46%
Server didn't provide banner	8,771	0.37%
Server provided banner	1,969,790	83.17%
Server banner identifies software in use	1,113,898	47.03%

As indicated by the above table, of the 2,368,333 servers queried, only 1,113,898 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	583,521	52.39%
Postfix	327,735	29.42%
Sendmail	92,209	8.28%
Microsoft	42,030	3.77%
MailEnable	30,326	2.72%
MDaemon	18,268	1.64%
IMail	4,712	0.42%
Lotus Domino	2,783	0.25%
CommuniGate Pro	2,688	0.24%
WinWebMail	1,920	0.17%
XMail	1,712	0.15%
Qmail Toaster	1,321	0.12%
Kerio	963	0.09%
SurgeSMTP	906	0.08%
Merak	707	0.06%
ArGoSoft	430	0.04%
MagicMail	295	0.03%
Post.Office	266	0.02%
GroupWise	248	0.02%
Gordano Messaging Suite (GMS)	230	0.02%
Trend Micro	171	0.02%
OpenSMTPD	115	0.01%
InterScan VirusWall	80	0.01%
Mirapoint	69	0.01%
VisNetic	54	0.00%
Mercury	27	0.00%
OpenVMS	21	0.00%
Interscan	20	0.00%
WebSTAR V	19	0.00%
Neon Mail Server	15	0.00%
NetIQ MailMarshal	13	0.00%
ModusMail	10	0.00%
MessageWall	7	0.00%
MAILsweeper	4	0.00%
WebSTAR	3	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (583,521 servers)
Version	Number of Servers	Percent
4.82	457,765	78.45%
4.80.1	27,970	4.79%
4.80	24,125	4.13%
4.76	18,929	3.24%
4.72	16,052	2.75%
4.69	10,303	1.77%
4.77	6,848	1.17%
Other	21,529	3.69%
Postfix (327,735 servers)
Version	Number of Servers	Percent
Other	327,735	100.00%
Sendmail (92,209 servers)
Version	Number of Servers	Percent
8.13.8	20,921	22.69%
8.14.5	18,909	20.51%
8.14.4	14,871	16.13%
8.13.1	12,207	13.24%
8.14.3	6,888	7.47%
8.12.11.20060308	2,409	2.61%
8.13.6.20060614	2,403	2.61%
8.14.7	1,667	1.81%
8.14.2	1,319	1.43%
8.11.6	1,135	1.23%
8.12.10	1,083	1.17%
8.14.1	963	1.04%
Other	7,434	8.06%
Microsoft (42,030 servers)
Version	Number of Servers	Percent
6.0.3790.4675	32,771	77.97%
6.0.3790.3959	3,640	8.66%
7.5.7601.17514	2,090	4.97%
6.0.3790.1830	981	2.33%
7.0.6002.18264	444	1.06%
5.0.2195.7381	428	1.02%
Other	1,676	3.99%
MailEnable (30,326 servers)
Version	Number of Servers	Percent
1.986--	2,838	9.36%
6.5--	2,253	7.43%
5.10--	1,400	4.62%
8.04--	1,067	3.52%
6.0--	1,010	3.33%
4.26--	1,004	3.31%
8.51--	919	3.03%
8.00--	855	2.82%
7.06--	826	2.72%
8.50--	759	2.50%
7.50--	558	1.84%
7.07--	542	1.79%
1.981--	533	1.76%
7.0--	483	1.59%
6.57--	480	1.58%
7.53--	478	1.58%
6.70--	447	1.47%
6.03--	338	1.11%
Other	13,536	44.63%
MDaemon (18,268 servers)
Version	Number of Servers	Percent
14.0.3	2,538	13.89%
14.0.2	1,411	7.72%
11.0.3	1,082	5.92%
11.0.0	981	5.37%
13.0.4	870	4.76%
13.0.5	787	4.31%
13.5.1	654	3.58%
10.0.0	491	2.69%
13.6.2	488	2.67%
12.5.6	487	2.67%
14.0.0	481	2.63%
13.6.0	383	2.10%
10.1.2	380	2.08%
10.1.1	333	1.82%
13.5.2	332	1.82%
12.5.4	331	1.81%
13.0.3	283	1.55%
9.6.1	280	1.53%
10.1.0	273	1.49%
13.6.1	264	1.45%
9.6.6	252	1.38%
13.0.2	250	1.37%
9.6.2	239	1.31%
Other	4,398	24.07%
IMail (4,712 servers)
Version	Number of Servers	Percent
12.3.0.100	626	13.29%
8.22	505	10.72%
12.2.0.235	434	9.21%
12.4.1.15	341	7.24%
9.23	291	6.18%
11.5	291	6.18%
8.15	249	5.28%
8.05	209	4.44%
12.4.0.166	187	3.97%
11.03	142	3.01%
12.4.1.9	135	2.87%
11.01	135	2.87%
10.02	99	2.10%
12.1.0.270	99	2.10%
11.02	93	1.97%
7.15	83	1.76%
6.06	77	1.63%
7.07	67	1.42%
12.2.0.169	57	1.21%
8.00	52	1.10%
10.01	48	1.02%
Other	492	10.44%
Lotus Domino (2,783 servers)
Version	Number of Servers	Percent
8.5.3	464	16.67%
8.5.3FP6	173	6.22%
8.5.2	148	5.32%
8.5.3FP3	143	5.14%
8.5.1	114	4.10%
8.5.3FP4	112	4.02%
8.5.3FP2	108	3.88%
7.0.2	100	3.59%
8.5.3FP5	92	3.31%
8.5	83	2.98%
8.5.2FP2	80	2.87%
8.5.2FP3	80	2.87%
8.5.3FP1	73	2.62%
8.5.2FP4	71	2.55%
7.0.3	55	1.98%
8.5.1FP5	46	1.65%
7.0.1	41	1.47%
7.0	40	1.44%
6.5.3	40	1.44%
8.5.2FP1	38	1.37%
6.5.1	38	1.37%
8.0.1	37	1.33%
6.5.4	34	1.22%
8.0	34	1.22%
8.0.2	34	1.22%
6.5	30	1.08%
Other	475	17.07%
CommuniGate Pro (2,688 servers)
Version	Number of Servers	Percent
6.0.9	346	12.87%
5.1.16	263	9.78%
6.0.7	131	4.87%
6.0.8	127	4.72%
5.2.20	95	3.53%
4.1.8	84	3.12%
5.4.11	77	2.86%
6.0.5	74	2.75%
5.3.13	59	2.19%
5.0.14	52	1.93%
4.2.10	50	1.86%
5.2.19	48	1.79%
5.2.3	47	1.75%
5.1.12	43	1.60%
5.3.15	42	1.56%
5.4.4	41	1.53%
5.4.8	38	1.41%
5.4.1	38	1.41%
5.2.16	37	1.38%
6.0.1	36	1.34%
5.4.6	34	1.26%
5.4.5	31	1.15%
5.4.10	31	1.15%
6.0.4	27	1.00%
6.0.6	27	1.00%
Other	810	30.13%
WinWebMail (1,920 servers)
Version	Number of Servers	Percent
3.8.1.3	339	17.66%
3.8.0.1	180	9.38%
3.7.6.1	174	9.06%
3.8.1.5	138	7.19%
3.9.0.1	136	7.08%
3.8.6.1	116	6.04%
3.8.1.1	112	5.83%
3.8.5.1	104	5.42%
3.7.3.1	103	5.36%
3.7.7.3	84	4.38%
3.9.0.7	57	2.97%
3.7.1.1	56	2.92%
3.8.2.1	55	2.86%
3.9.0.5	37	1.93%
3.7.5.1	34	1.77%
3.8.3.1	34	1.77%
3.8.3.3	26	1.35%
3.7.0.3	24	1.25%
3.7.0.5	24	1.25%
3.7.0.7	20	1.04%
Other	67	3.49%
XMail (1,712 servers)
Version	Number of Servers	Percent
1.27	576	33.64%
1.22	464	27.10%
1.25	234	13.67%
1.26	167	9.75%
1.24	98	5.72%
1.21	48	2.80%
1.23	26	1.52%
1.20	20	1.17%
1.17	19	1.11%
Other	60	3.50%
Qmail Toaster (1,321 servers)
Version	Number of Servers	Percent
1.3	1,249	94.55%
1.2	34	2.57%
Other	38	2.88%
Kerio (963 servers)
Version	Number of Servers	Percent
6.7.3	181	18.80%
6.7.0	99	10.28%
6.6.2	86	8.93%
6.5.2	74	7.68%
6.5.0	70	7.27%
6.7.2	57	5.92%
6.4.1	53	5.50%
6.3.1	44	4.57%
6.6.1	42	4.36%
6.7.1	42	4.36%
6.3.0	26	2.70%
6.5.1	26	2.70%
6.4.0	25	2.60%
6.4.2	23	2.39%
6.6.0	15	1.56%
6.2.0	11	1.14%
6.1.3	11	1.14%
6.0.10	10	1.04%
Other	68	7.06%
SurgeSMTP (906 servers)
Version	Number of Servers	Percent
6.5a2-2	218	24.06%
6.5a-1	90	9.93%
6.3c2-2	71	7.84%
6.4a-1	65	7.17%
5.2a-1	43	4.75%
6.7a-1	39	4.30%
5.3h2-2	35	3.86%
6.7b-13	32	3.53%
6.1c-1	29	3.20%
3.9e-1	26	2.87%
3.8k4-4	19	2.10%
4.0u4-4	16	1.77%
6.0a5-5	13	1.43%
6.7b-30	11	1.21%
Other	199	21.96%
Merak (707 servers)
Version	Number of Servers	Percent
8.0.3	242	34.23%
8.9.1	95	13.44%
8.5.0	52	7.36%
8.3.8	43	6.08%
7.5.2	36	5.09%
7.4.5	34	4.81%
7.6.4	29	4.10%
7.6.1	14	1.98%
7.2.0	13	1.84%
7.4.2	11	1.56%
7.0.1	11	1.56%
8.3.15	11	1.56%
8.9.0	10	1.41%
9.0.0	10	1.41%
8.2.4	8	1.13%
Other	88	12.45%
ArGoSoft (430 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	113	26.28%
1.8 (1.8.9.3)	61	14.19%
1.8 (1.8.9.5)	60	13.95%
1.8 (1.8.9.1)	39	9.07%
1.8 (1.8.8.7)	26	6.05%
1.8 (1.8.8.8)	24	5.58%
1.8 (1.8.9.2)	15	3.49%
1.8 (1.8.9.4)	12	2.79%
1.8 (1.8.6.0)	10	2.33%
1.8 (1.8.8.9)	7	1.63%
1.8 (1.8.7.3)	7	1.63%
Other	56	13.02%
MagicMail (295 servers)
Version	Number of Servers	Percent
Other	295	100.00%
Post.Office (266 servers)
Version	Number of Servers	Percent
3.5.3	37	13.91%
4.1.2.4	34	12.78%
4.2.2	34	12.78%
4.1.0.2	17	6.39%
4.1.1	13	4.89%
4.0.1	12	4.51%
3.9.2.3	10	3.76%
3.5.3J	9	3.38%
4.1.0.3	8	3.01%
4.2.1.3	8	3.01%
4.2	6	2.26%
3.1.2J	6	2.26%
4.2.1.1	6	2.26%
3.1.2	5	1.88%
4.1.2.3	5	1.88%
3.8.7.4	5	1.88%
3.5.4	4	1.50%
4.1.0.4	4	1.50%
3.5.1	4	1.50%
3.9.2	3	1.13%
4.2.1.2	3	1.13%
3.5.2	3	1.13%
3.9.1.2	3	1.13%
4.1.2.2	3	1.13%
3.9.1	3	1.13%
Other	21	7.89%
GroupWise (248 servers)
Version	Number of Servers	Percent
7.0.3	41	16.53%
8.0.2	30	12.10%
7.0.4	24	9.68%
6.5.7	24	9.68%
8.0.3	21	8.47%
12.0.2	17	6.85%
14.0.0	13	5.24%
7.0.2	12	4.84%
6.5.6	10	4.03%
6.5.4	9	3.63%
7.0.1	6	2.42%
6.0.4	5	2.02%
14.0.1	5	2.02%
8.0.1	4	1.61%
6.5.5	4	1.61%
8.0.0	4	1.61%
12.0.1	3	1.21%
Other	16	6.45%
Gordano Messaging Suite (GMS) (230 servers)
Version	Number of Servers	Percent
Other	230	100.00%
Trend Micro (171 servers)
Version	Number of Servers	Percent
5.7	67	39.18%
5.5	35	20.47%
5.18	29	16.96%
7.0	14	8.19%
7.1	11	6.43%
8.5	4	2.34%
3.53	3	1.75%
5.15	2	1.17%
Other	6	3.51%
OpenSMTPD (115 servers)
Version	Number of Servers	Percent
Other	115	100.00%
InterScan VirusWall (80 servers)
Version	Number of Servers	Percent
Other	80	100.00%
Mirapoint (69 servers)
Version	Number of Servers	Percent
4.3.5-GA	10	14.49%
4.4.3-GA	7	10.14%
4.3.6-GA	6	8.70%
4.4.2a-FCS	5	7.25%
4.4.5-GA	4	5.80%
4.4.4-GA	4	5.80%
4.1.10-GA	4	5.80%
3.10.10a-GA	3	4.35%
4.3.7-GA	3	4.35%
3.10.4-GA	2	2.90%
4.2.3-GA	2	2.90%
4.1.9-GA	2	2.90%
4.3.3-GA	2	2.90%
4.4.4b-GA	2	2.90%
4.1.5-GA	2	2.90%
3.10.7-GA	2	2.90%
3.8.4-GA	2	2.90%
4.1.3-GA	1	1.45%
4.2.4-GA	1	1.45%
4.1.6-GA	1	1.45%
3.7.5a-GA	1	1.45%
3.8.7a	1	1.45%
3.10.2-GA	1	1.45%
4.1.8-GA	1	1.45%
Other	0	0.00%
VisNetic (54 servers)
Version	Number of Servers	Percent
9.3.2.0	15	27.78%
9.1.4.1	5	9.26%
8.0.3.1	4	7.41%
8.5.0.8	4	7.41%
7.2.4.1	3	5.56%
6.2.2.0	3	5.56%
8.3.5.0	2	3.70%
5.0.2.3	2	3.70%
9.1.4.0	2	3.70%
5.5.8.3	2	3.70%
5.3.5.0	2	3.70%
8.0.3	1	1.85%
8.3.0.1	1	1.85%
8.5.0.5	1	1.85%
5.4.5.4	1	1.85%
8.0.3.0	1	1.85%
5.4.5	1	1.85%
7.6.1.0	1	1.85%
5.0.2.0	1	1.85%
5.8.6.6	1	1.85%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	1.85%
Other	0	0.00%
Mercury (27 servers)
Version	Number of Servers	Percent
3.32	12	44.44%
1.48	12	44.44%
3.21	1	3.70%
3.21c	1	3.70%
4.x	1	3.70%
Other	0	0.00%
OpenVMS (21 servers)
Version	Number of Servers	Percent
8.3	8	38.10%
8.4	6	28.57%
7.3	6	28.57%
8.2	1	4.76%
Other	0	0.00%
Interscan (20 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	4	20.00%
3.81-Build_1084	3	15.00%
3.81-Build_1022	3	15.00%
3.8-Build_3013	2	10.00%
3.55 (build 1029)	2	10.00%
3.53 (build 1493)	2	10.00%
3.5 (build 1294)	1	5.00%
3.55 (build 1020)	1	5.00%
3.53 (build 2013)	1	5.00%
3.8-Build_1080	1	5.00%
Other	0	0.00%
WebSTAR V (19 servers)
Version	Number of Servers	Percent
5.4.1	9	47.37%
5.4.0	7	36.84%
5.3.4	2	10.53%
5.3.3	1	5.26%
Other	0	0.00%
Neon Mail Server (15 servers)
Version	Number of Servers	Percent
3.0.7	4	26.67%
3.1.4	3	20.00%
3.1.2	2	13.33%
3.1.0	2	13.33%
3.1.3	1	6.67%
3.0.6	1	6.67%
3.0.8	1	6.67%
3.0.9	1	6.67%
Other	0	0.00%
NetIQ MailMarshal (13 servers)
Version	Number of Servers	Percent
6.0.3.8	8	61.54%
5.5.6.5	2	15.38%
5.5.5.6	1	7.69%
5.5.4.17	1	7.69%
5.5.6.7	1	7.69%
Other	0	0.00%
ModusMail (10 servers)
Version	Number of Servers	Percent
4.35.477.0	6	60.00%
4.1.361.21	1	10.00%
3.2.315.0	1	10.00%
4.35.477.8	1	10.00%
3.1.302.0	1	10.00%
Other	0	0.00%
MessageWall (7 servers)
Version	Number of Servers	Percent
1.0.8	6	85.71%
1.0.6	1	14.29%
Other	0	0.00%
MAILsweeper (4 servers)
Version	Number of Servers	Percent
4.3.17.0	2	50.00%
4.3.19.0	1	25.00%
4.3.20.0	1	25.00%
Other	0	0.00%
WebSTAR (3 servers)
Version	Number of Servers	Percent
Other	3	100.00%