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	2,024,632	100.0%
Number of Servers that didn't respond	371,146	18.33%
Server didn't open socket	363,837	17.97%
Server didn't provide banner	7,309	0.36%
Server provided banner	1,653,486	81.67%
Server banner identifies software in use	1,012,109	49.99%

As indicated by the above table, of the 2,024,632 servers queried, only 1,012,109 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	570,219	56.34%
Postfix	339,252	33.52%
Sendmail	47,908	4.73%
MailEnable	23,055	2.28%
MDaemon	11,627	1.15%
Microsoft	9,647	0.95%
IMail	2,107	0.21%
CommuniGate Pro	1,770	0.17%
XMail	1,054	0.10%
WinWebMail	1,013	0.10%
Lotus Domino	997	0.10%
Qmail Toaster	803	0.08%
SurgeSMTP	663	0.07%
Kerio	440	0.04%
OpenSMTPD	313	0.03%
Merak	290	0.03%
MagicMail	193	0.02%
ArGoSoft	183	0.02%
Post.Office	163	0.02%
Gordano Messaging Suite (GMS)	113	0.01%
GroupWise	101	0.01%
Trend Micro	66	0.01%
VisNetic	29	0.00%
InterScan VirusWall	26	0.00%
Mirapoint	20	0.00%
OpenVMS	15	0.00%
Mercury	10	0.00%
ModusMail	7	0.00%
WebSTAR V	7	0.00%
Interscan	6	0.00%
MessageWall	6	0.00%
Neon Mail Server	5	0.00%
WebSTAR	1	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (570,219 servers)
Version	Number of Servers	Percent
4.89	291,006	51.03%
4.87	171,194	30.02%
4.88	23,233	4.07%
4.84	18,734	3.29%
4.80	10,798	1.89%
4.86	9,036	1.58%
4.85	7,654	1.34%
4.72	7,467	1.31%
4.82	6,938	1.22%
4.76	6,827	1.20%
Other	17,332	3.04%
Postfix (339,252 servers)
Version	Number of Servers	Percent
Other	339,252	100.00%
Sendmail (47,908 servers)
Version	Number of Servers	Percent
8.14.5	11,825	24.68%
8.14.4	11,453	23.91%
8.13.8	7,745	16.17%
8.13.1	4,849	10.12%
8.15.2	2,530	5.28%
8.14.3	2,299	4.80%
8.14.7	1,727	3.60%
8.14.9	1,379	2.88%
8.14.2	482	1.01%
Other	3,619	7.55%
MailEnable (23,055 servers)
Version	Number of Servers	Percent
9.00--	3,142	13.63%
8.60--	1,241	5.38%
9.16--	1,187	5.15%
8.53--	1,054	4.57%
6.5--	884	3.83%
8.51--	696	3.02%
1.986--	607	2.63%
8.04--	520	2.26%
8.60-8.60-	438	1.90%
9.74--	352	1.53%
5.10--	350	1.52%
8.50--	342	1.48%
9.53--	322	1.40%
8.00--	313	1.36%
9.75--	268	1.16%
6.0--	244	1.06%
7.06--	244	1.06%
4.26--	231	1.00%
Other	10,620	46.06%
MDaemon (11,627 servers)
Version	Number of Servers	Percent
17.0.2	1,254	10.79%
16.5.2	992	8.53%
13.5.1	577	4.96%
11.0.0	483	4.15%
11.0.3	464	3.99%
13.0.4	462	3.97%
13.0.5	453	3.90%
13.6.3	427	3.67%
16.0.4	424	3.65%
16.5.1	319	2.74%
17.0.0	273	2.35%
12.5.6	261	2.24%
12.5.4	239	2.06%
15.0.3	236	2.03%
14.5.2	194	1.67%
10.0.0	182	1.57%
10.1.2	174	1.50%
15.5.3	170	1.46%
16.0.1	154	1.32%
10.1.1	127	1.09%
10.1.0	118	1.01%
Other	3,644	31.34%
Microsoft (9,647 servers)
Version	Number of Servers	Percent
6.0.3790.4675	5,823	60.36%
7.5.7601.17514	1,145	11.87%
8.5.9600.16384	759	7.87%
6.0.3790.3959	689	7.14%
8.0.9200.16384	196	2.03%
5.0.2195.5329	173	1.79%
6.0.3790.1830	167	1.73%
7.0.6002.18264	157	1.63%
5.0.2195.7381	109	1.13%
Other	429	4.45%
IMail (2,107 servers)
Version	Number of Servers	Percent
12.5.5.115	396	18.79%
12.4.1.15	176	8.35%
8.22	164	7.78%
12.5.3.93	156	7.40%
12.5.4.146	137	6.50%
9.23	134	6.36%
12.3.0.100	102	4.84%
8.15	96	4.56%
8.05	68	3.23%
11.03	60	2.85%
11.5	55	2.61%
12.5.6.101	35	1.66%
7.07	31	1.47%
12.5.1.60	30	1.42%
7.15	29	1.38%
10.02	28	1.33%
12.5.5.117	27	1.28%
11.02	23	1.09%
10.01	23	1.09%
Other	337	15.99%
CommuniGate Pro (1,770 servers)
Version	Number of Servers	Percent
6.1.16	181	10.23%
5.1.16	155	8.76%
6.1.11	71	4.01%
5.4.11	64	3.62%
6.1.10	63	3.56%
6.0.11	58	3.28%
5.2.20	57	3.22%
6.1.15	47	2.66%
6.0.9	47	2.66%
6.1.13	46	2.60%
6.1.2	44	2.49%
6.1.14	42	2.37%
6.2	40	2.26%
6.1.12	39	2.20%
5.3.13	38	2.15%
5.0.14	34	1.92%
5.2.3	33	1.86%
6.1.5	27	1.53%
6.1.8	26	1.47%
4.1.8	25	1.41%
6.0.10	22	1.24%
5.4.4	21	1.19%
5.3.15	18	1.02%
6.1.7	18	1.02%
Other	554	31.30%
XMail (1,054 servers)
Version	Number of Servers	Percent
1.27	463	43.93%
1.22	332	31.50%
1.25	80	7.59%
1.26	68	6.45%
1.24	44	4.17%
1.21	20	1.90%
1.23	15	1.42%
Other	32	3.04%
WinWebMail (1,013 servers)
Version	Number of Servers	Percent
3.9.0.7	228	22.51%
3.8.1.3	159	15.70%
3.9.0.1	68	6.71%
3.7.6.1	65	6.42%
3.8.0.1	57	5.63%
3.8.1.5	45	4.44%
3.9.2.1	42	4.15%
3.8.1.1	37	3.65%
3.8.5.1	37	3.65%
3.8.6.1	35	3.46%
3.7.3.1	32	3.16%
3.9.3.1	32	3.16%
3.7.7.3	28	2.76%
3.8.2.1	24	2.37%
3.7.1.1	20	1.97%
3.8.3.1	15	1.48%
3.7.5.1	12	1.18%
3.9.1.1	11	1.09%
Other	66	6.52%
Lotus Domino (997 servers)
Version	Number of Servers	Percent
8.5.3FP6	189	18.96%
8.5.3	135	13.54%
8.5.2	44	4.41%
8.5	36	3.61%
7.0.2	35	3.51%
8.5.1	32	3.21%
8.5.3FP2	28	2.81%
8.5.2FP4	26	2.61%
8.5.3FP3	23	2.31%
7.0.3	23	2.31%
8.5.3FP1	23	2.31%
8.5.3FP4	22	2.21%
8.5.3FP5	22	2.21%
8.5.2FP3	22	2.21%
8.5.2FP2	19	1.91%
8.0	18	1.81%
8.0.1	17	1.71%
8.5.1FP5	16	1.60%
7.0.4	15	1.50%
6.5.1	15	1.50%
7.0	14	1.40%
6.5.4	12	1.20%
7.0.1	12	1.20%
6.5	10	1.00%
7.0.3FP1	10	1.00%
Other	179	17.95%
Qmail Toaster (803 servers)
Version	Number of Servers	Percent
1.3	699	87.05%
1.03	64	7.97%
1.2	14	1.74%
1.03.5	10	1.25%
1.03.6	9	1.12%
Other	7	0.87%
SurgeSMTP (663 servers)
Version	Number of Servers	Percent
7.2i-1	127	19.16%
7.1e-1	93	14.03%
6.5a2-2	40	6.03%
7.2a-1	39	5.88%
7.2e-2	36	5.43%
6.9c-1	32	4.83%
6.7c-1	26	3.92%
6.5a-1	25	3.77%
7.3c3-3	25	3.77%
7.0c2-2	19	2.87%
3.9e-1	17	2.56%
5.2a-1	15	2.26%
7.3d-5	11	1.66%
6.1c-1	11	1.66%
6.4a-1	9	1.36%
3.8k4-4	9	1.36%
4.0u4-4	9	1.36%
7.3d-4	8	1.21%
5.3h2-2	7	1.06%
6.3c2-2	7	1.06%
Other	98	14.78%
Kerio (440 servers)
Version	Number of Servers	Percent
6.7.3	96	21.82%
6.7.0	52	11.82%
6.5.2	44	10.00%
6.6.2	40	9.09%
6.7.2	31	7.05%
6.5.0	26	5.91%
6.4.1	18	4.09%
6.6.1	18	4.09%
6.7.1	18	4.09%
6.3.1	15	3.41%
6.4.0	11	2.50%
6.5.1	11	2.50%
6.3.0	10	2.27%
6.1.3	8	1.82%
6.4.2	6	1.36%
6.6.0	6	1.36%
Other	30	6.82%
OpenSMTPD (313 servers)
Version	Number of Servers	Percent
Other	313	100.00%
Merak (290 servers)
Version	Number of Servers	Percent
8.0.3	85	29.31%
8.9.1	48	16.55%
8.5.0	26	8.97%
7.5.2	16	5.52%
8.3.8	15	5.17%
7.4.5	14	4.83%
7.6.1	12	4.14%
7.6.4	12	4.14%
7.4.2	5	1.72%
7.0.1	5	1.72%
6.1.0	4	1.38%
9.0.3	4	1.38%
7.2.0	4	1.38%
5.9.4	3	1.03%
4.2.1	3	1.03%
7.6.0	3	1.03%
8.9.0	3	1.03%
6.0.8	3	1.03%
Other	25	8.62%
MagicMail (193 servers)
Version	Number of Servers	Percent
Other	193	100.00%
ArGoSoft (183 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	66	36.07%
1.8 (1.8.9.5)	23	12.57%
1.8 (1.8.9.3)	19	10.38%
1.8 (1.8.9.1)	19	10.38%
1.8 (1.8.7.3)	6	3.28%
1.8 (1.8.8.8)	5	2.73%
1.8 (1.8.9.2)	5	2.73%
1.8 (1.8.8.7)	5	2.73%
1.8 (1.8.8.9)	4	2.19%
1.8 (1.8.6.0)	4	2.19%
1.8 (1.8.9.4)	3	1.64%
1.8 (1.8.7.6)	2	1.09%
1.8 (1.8.8.4)	2	1.09%
1.8 (1.8.5.8)	2	1.09%
1.8 (1.8.2.1)	2	1.09%
1.8 (1.8.5.9)	2	1.09%
Other	14	7.65%
Post.Office (163 servers)
Version	Number of Servers	Percent
4.2.2	33	20.25%
4.3	32	19.63%
4.1.2.4	20	12.27%
3.5.3	16	9.82%
4.2.1.3	9	5.52%
3.9.2.3	5	3.07%
4.1.1	4	2.45%
4.2.1.1	4	2.45%
3.1.2	4	2.45%
3.9.2	3	1.84%
4.0.1	3	1.84%
3.5.1	3	1.84%
3.5.4	2	1.23%
4.2	2	1.23%
4.1.0.3	2	1.23%
4.1.2.3	2	1.23%
4.1.0.2	2	1.23%
3.8.7.4	2	1.23%
3.9.1.3	2	1.23%
3.5.3J	2	1.23%
Other	11	6.75%
Gordano Messaging Suite (GMS) (113 servers)
Version	Number of Servers	Percent
Other	113	100.00%
GroupWise (101 servers)
Version	Number of Servers	Percent
14.2.2	18	17.82%
14.2.1	17	16.83%
14.2.0	10	9.90%
6.5.7	7	6.93%
14.0.1	6	5.94%
14.0.2	5	4.95%
7.0.3	5	4.95%
14.0.0	5	4.95%
8.0.3	4	3.96%
7.0.2	3	2.97%
7.0.4	3	2.97%
12.0.4	2	1.98%
12.0.1	2	1.98%
8.0.2	2	1.98%
6.0.4	2	1.98%
Other	10	9.90%
Trend Micro (66 servers)
Version	Number of Servers	Percent
5.7	20	30.30%
5.18	13	19.70%
5.5	13	19.70%
7.0	8	12.12%
7.5	5	7.58%
7.1	2	3.03%
3.53	2	3.03%
8.5	1	1.52%
9.0	1	1.52%
8	1	1.52%
Other	0	0.00%
VisNetic (29 servers)
Version	Number of Servers	Percent
9.3.2.0	9	31.03%
6.2.2.0	3	10.34%
5.8.6.6	3	10.34%
5.0.2.3	2	6.90%
5.5.8.3	2	6.90%
8.0.3	1	3.45%
9.1.4.0	1	3.45%
8.5.0.5	1	3.45%
7.6.1.0	1	3.45%
9.1.4.1	1	3.45%
8.0.3.1	1	3.45%
5.3.5.0	1	3.45%
5.0.2.0	1	3.45%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	3.45%
8.5.0.8	1	3.45%
Other	0	0.00%
InterScan VirusWall (26 servers)
Version	Number of Servers	Percent
Other	26	100.00%
Mirapoint (20 servers)
Version	Number of Servers	Percent
4.4.3-GA	4	20.00%
4.4.2a-FCS	3	15.00%
4.3.5-GA	3	15.00%
4.4.7-GA	2	10.00%
4.1.9-GA	1	5.00%
4.4.4-GA	1	5.00%
4.3.6-GA	1	5.00%
3.10.10a-GA	1	5.00%
4.4.3a-GA	1	5.00%
3.7.5a-GA	1	5.00%
4.4.5-GA	1	5.00%
4.4.6-GA	1	5.00%
Other	0	0.00%
OpenVMS (15 servers)
Version	Number of Servers	Percent
8.4	6	40.00%
7.3	5	33.33%
8.3	3	20.00%
8.2	1	6.67%
Other	0	0.00%
Mercury (10 servers)
Version	Number of Servers	Percent
3.32	4	40.00%
1.48	4	40.00%
3.21	1	10.00%
4.x	1	10.00%
Other	0	0.00%
ModusMail (7 servers)
Version	Number of Servers	Percent
4.35.477.0	5	71.43%
4.1.361.21	1	14.29%
4.35.477.8	1	14.29%
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 (6 servers)
Version	Number of Servers	Percent
3.81-Build_1022	2	33.33%
3.81-Build_1084	1	16.67%
3.8-Build_3013	1	16.67%
3.8-Build_1080	1	16.67%
3.5 (build 1294)	1	16.67%
Other	0	0.00%
MessageWall (6 servers)
Version	Number of Servers	Percent
1.0.8	6	100.00%
Other	0	0.00%
Neon Mail Server (5 servers)
Version	Number of Servers	Percent
3.1.0	2	40.00%
3.1.3	1	20.00%
3.0.7	1	20.00%
3.1.2	1	20.00%
Other	0	0.00%
WebSTAR (1 servers)
Version	Number of Servers	Percent
Other	1	100.00%