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	2,008,770	100.0%
Number of Servers that didn't respond	362,975	18.07%
Server didn't open socket	355,446	17.69%
Server didn't provide banner	7,529	0.37%
Server provided banner	1,645,795	81.93%
Server banner identifies software in use	1,002,543	49.91%

As indicated by the above table, of the 2,008,770 servers queried, only 1,002,543 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	561,321	55.99%
Postfix	331,389	33.05%
Sendmail	50,749	5.06%
MailEnable	23,320	2.33%
MDaemon	13,413	1.34%
Microsoft	11,395	1.14%
IMail	2,207	0.22%
CommuniGate Pro	1,857	0.19%
Lotus Domino	1,122	0.11%
XMail	1,090	0.11%
WinWebMail	1,062	0.11%
Qmail Toaster	798	0.08%
SurgeSMTP	674	0.07%
Kerio	476	0.05%
Merak	312	0.03%
OpenSMTPD	286	0.03%
MagicMail	261	0.03%
ArGoSoft	217	0.02%
Post.Office	161	0.02%
Gordano Messaging Suite (GMS)	114	0.01%
GroupWise	103	0.01%
Trend Micro	74	0.01%
InterScan VirusWall	30	0.00%
VisNetic	29	0.00%
Mirapoint	24	0.00%
OpenVMS	14	0.00%
Mercury	9	0.00%
ModusMail	9	0.00%
WebSTAR V	7	0.00%
MessageWall	6	0.00%
Interscan	5	0.00%
Neon Mail Server	5	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 (561,321 servers)
Version	Number of Servers	Percent
4.87	254,274	45.30%
4.88	206,795	36.84%
4.84	20,397	3.63%
4.86	13,519	2.41%
4.80	12,006	2.14%
4.72	8,998	1.60%
4.85	8,980	1.60%
4.76	7,959	1.42%
4.82	7,603	1.35%
4.80.1	5,935	1.06%
Other	14,855	2.65%
Postfix (331,389 servers)
Version	Number of Servers	Percent
Other	331,389	100.00%
Sendmail (50,749 servers)
Version	Number of Servers	Percent
8.14.4	11,818	23.29%
8.14.5	11,721	23.10%
8.13.8	8,921	17.58%
8.13.1	5,416	10.67%
8.14.3	2,552	5.03%
8.15.2	2,199	4.33%
8.14.7	1,493	2.94%
8.14.9	1,475	2.91%
8.12.11.20060308	852	1.68%
8.14.2	514	1.01%
Other	3,788	7.46%
MailEnable (23,320 servers)
Version	Number of Servers	Percent
9.00--	3,043	13.05%
8.60--	1,412	6.05%
8.53--	1,144	4.91%
6.5--	1,051	4.51%
1.986--	832	3.57%
8.51--	803	3.44%
8.04--	585	2.51%
8.60-8.60-	455	1.95%
5.10--	437	1.87%
8.50--	428	1.84%
9.53--	426	1.83%
8.00--	364	1.56%
6.0--	311	1.33%
4.26--	309	1.33%
7.06--	304	1.30%
9.16--	279	1.20%
9.50--	267	1.14%
9.12--	263	1.13%
Other	10,607	45.48%
MDaemon (13,413 servers)
Version	Number of Servers	Percent
16.5.2	2,469	18.41%
16.0.4	779	5.81%
16.5.1	694	5.17%
13.5.1	583	4.35%
11.0.0	515	3.84%
11.0.3	497	3.71%
13.0.4	497	3.71%
13.0.5	495	3.69%
13.6.3	441	3.29%
15.0.3	319	2.38%
12.5.6	274	2.04%
15.5.3	241	1.80%
16.5.0	236	1.76%
12.5.4	231	1.72%
14.5.2	217	1.62%
10.0.0	214	1.60%
16.0.1	205	1.53%
10.1.2	194	1.45%
16.0.2	178	1.33%
10.1.0	136	1.01%
Other	3,998	29.81%
Microsoft (11,395 servers)
Version	Number of Servers	Percent
6.0.3790.4675	7,191	63.11%
7.5.7601.17514	1,237	10.86%
6.0.3790.3959	853	7.49%
8.5.9600.16384	717	6.29%
6.0.3790.1830	243	2.13%
8.0.9200.16384	197	1.73%
5.0.2195.5329	180	1.58%
7.0.6002.18264	173	1.52%
5.0.2195.7381	132	1.16%
Other	472	4.14%
IMail (2,207 servers)
Version	Number of Servers	Percent
12.5.5.115	339	15.36%
8.22	181	8.20%
12.4.1.15	181	8.20%
12.5.3.93	168	7.61%
12.5.4.146	158	7.16%
9.23	152	6.89%
8.15	113	5.12%
12.3.0.100	105	4.76%
8.05	78	3.53%
11.03	64	2.90%
11.5	59	2.67%
7.07	36	1.63%
10.02	36	1.63%
12.5.1.60	34	1.54%
11.02	32	1.45%
7.15	31	1.40%
12.5.3.99	29	1.31%
12.2.0.235	26	1.18%
12.5.2.62	24	1.09%
12.1.0.270	23	1.04%
Other	338	15.31%
CommuniGate Pro (1,857 servers)
Version	Number of Servers	Percent
5.1.16	176	9.48%
6.1.11	106	5.71%
6.1.14	100	5.39%
6.1.10	77	4.15%
5.4.11	72	3.88%
6.1.13	70	3.77%
6.0.11	69	3.72%
6.1.12	68	3.66%
5.2.20	64	3.45%
6.0.9	49	2.64%
6.1.2	46	2.48%
5.3.13	39	2.10%
5.2.3	37	1.99%
6.1.8	36	1.94%
5.0.14	34	1.83%
5.3.15	32	1.72%
4.1.8	30	1.62%
6.1.5	29	1.56%
6.0.10	28	1.51%
6.1.7	24	1.29%
5.1.12	22	1.18%
6.1.4	21	1.13%
5.4.4	20	1.08%
5.4.5	19	1.02%
Other	589	31.72%
Lotus Domino (1,122 servers)
Version	Number of Servers	Percent
8.5.3FP6	211	18.81%
8.5.3	155	13.81%
8.5.2	53	4.72%
8.5.1	45	4.01%
8.5	39	3.48%
7.0.2	37	3.30%
8.5.3FP4	31	2.76%
8.5.2FP4	29	2.58%
8.5.2FP3	28	2.50%
8.5.3FP2	27	2.41%
8.5.3FP3	27	2.41%
8.5.3FP1	24	2.14%
8.0.1	23	2.05%
7.0.3	23	2.05%
8.0	21	1.87%
8.5.3FP5	18	1.60%
7.0	17	1.52%
7.0.1	17	1.52%
8.5.1FP5	17	1.52%
7.0.4	16	1.43%
8.5.2FP2	16	1.43%
6.5.1	15	1.34%
6.5.5	12	1.07%
6.5.4	12	1.07%
Other	209	18.63%
XMail (1,090 servers)
Version	Number of Servers	Percent
1.27	467	42.84%
1.22	326	29.91%
1.25	89	8.17%
1.26	79	7.25%
1.24	52	4.77%
1.21	23	2.11%
1.23	16	1.47%
Other	38	3.49%
WinWebMail (1,062 servers)
Version	Number of Servers	Percent
3.9.0.7	284	26.74%
3.8.1.3	162	15.25%
3.7.6.1	73	6.87%
3.8.0.1	71	6.69%
3.9.0.1	69	6.50%
3.8.1.5	54	5.08%
3.7.3.1	43	4.05%
3.8.5.1	43	4.05%
3.8.1.1	42	3.95%
3.7.7.3	39	3.67%
3.8.6.1	38	3.58%
3.8.2.1	23	2.17%
3.7.1.1	20	1.88%
3.8.3.1	19	1.79%
3.7.0.5	12	1.13%
3.8.3.3	12	1.13%
Other	58	5.46%
Qmail Toaster (798 servers)
Version	Number of Servers	Percent
1.3	711	89.10%
1.03	41	5.14%
1.2	15	1.88%
1.03.6	9	1.13%
1.03.5	8	1.00%
Other	14	1.75%
SurgeSMTP (674 servers)
Version	Number of Servers	Percent
7.1e-1	147	21.81%
7.2a-1	81	12.02%
7.2e-2	73	10.83%
6.5a2-2	52	7.72%
6.9c-1	35	5.19%
6.7c-1	30	4.45%
6.5a-1	26	3.86%
7.0c2-2	19	2.82%
3.9e-1	18	2.67%
6.1c-1	16	2.37%
5.2a-1	16	2.37%
6.3c2-2	11	1.63%
4.0u4-4	10	1.48%
3.8k4-4	9	1.34%
6.4a-1	9	1.34%
5.3h2-2	8	1.19%
7.2g-1	8	1.19%
7.1f-32	7	1.04%
Other	99	14.69%
Kerio (476 servers)
Version	Number of Servers	Percent
6.7.3	100	21.01%
6.7.0	53	11.13%
6.6.2	42	8.82%
6.5.2	42	8.82%
6.5.0	29	6.09%
6.7.2	28	5.88%
6.4.1	25	5.25%
6.6.1	20	4.20%
6.7.1	19	3.99%
6.3.0	16	3.36%
6.3.1	16	3.36%
6.5.1	14	2.94%
6.4.0	13	2.73%
6.6.0	9	1.89%
6.1.3	9	1.89%
6.4.2	6	1.26%
6.2.0	6	1.26%
5.7.9	6	1.26%
6.1.0	5	1.05%
Other	18	3.78%
Merak (312 servers)
Version	Number of Servers	Percent
8.0.3	90	28.85%
8.9.1	44	14.10%
8.5.0	27	8.65%
7.4.5	19	6.09%
7.5.2	18	5.77%
8.3.8	16	5.13%
7.6.4	14	4.49%
7.6.1	12	3.85%
7.4.2	7	2.24%
8.3.15	7	2.24%
7.2.0	6	1.92%
7.0.1	5	1.60%
8.9.0	4	1.28%
Other	43	13.78%
OpenSMTPD (286 servers)
Version	Number of Servers	Percent
Other	286	100.00%
MagicMail (261 servers)
Version	Number of Servers	Percent
Other	261	100.00%
ArGoSoft (217 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	76	35.02%
1.8 (1.8.9.1)	25	11.52%
1.8 (1.8.9.5)	24	11.06%
1.8 (1.8.9.3)	20	9.22%
1.8 (1.8.8.8)	10	4.61%
1.8 (1.8.8.7)	9	4.15%
1.8 (1.8.7.3)	6	2.76%
1.8 (1.8.9.2)	6	2.76%
1.8 (1.8.6.0)	6	2.76%
1.8 (1.8.8.9)	4	1.84%
Other	31	14.29%
Post.Office (161 servers)
Version	Number of Servers	Percent
4.2.2	33	20.50%
4.3	29	18.01%
4.1.2.4	21	13.04%
3.5.3	17	10.56%
4.2.1.3	8	4.97%
3.9.2.3	5	3.11%
3.9.2	4	2.48%
4.0.1	4	2.48%
4.1.1	4	2.48%
4.2.1.1	4	2.48%
3.1.2	4	2.48%
3.8.7.4	3	1.86%
3.5.1	3	1.86%
3.5.4	2	1.24%
4.1.0.3	2	1.24%
4.1.0.2	2	1.24%
4.1.2.3	2	1.24%
3.5.3J	2	1.24%
4.2	2	1.24%
Other	10	6.21%
Gordano Messaging Suite (GMS) (114 servers)
Version	Number of Servers	Percent
Other	114	100.00%
GroupWise (103 servers)
Version	Number of Servers	Percent
14.2.1	31	30.10%
14.2.0	12	11.65%
6.5.7	7	6.80%
14.0.2	7	6.80%
14.0.1	7	6.80%
14.0.0	5	4.85%
8.0.3	4	3.88%
7.0.3	4	3.88%
7.0.2	3	2.91%
6.0.3	3	2.91%
7.0.4	3	2.91%
12.0.4	2	1.94%
12.0.1	2	1.94%
8.0.2	2	1.94%
8.0.1	2	1.94%
6.0.2	2	1.94%
Other	7	6.80%
Trend Micro (74 servers)
Version	Number of Servers	Percent
5.7	25	33.78%
5.18	14	18.92%
5.5	13	17.57%
7.0	8	10.81%
7.5	5	6.76%
7.1	2	2.70%
3.53	2	2.70%
8.5	1	1.35%
7.5ready	1	1.35%
8.5.2	1	1.35%
9.0	1	1.35%
8	1	1.35%
Other	0	0.00%
InterScan VirusWall (30 servers)
Version	Number of Servers	Percent
Other	30	100.00%
VisNetic (29 servers)
Version	Number of Servers	Percent
9.3.2.0	10	34.48%
5.8.6.6	2	6.90%
5.0.2.3	2	6.90%
6.2.2.0	2	6.90%
5.5.8.3	2	6.90%
9.1.4.1	2	6.90%
8.0.3	1	3.45%
8.3.0.1	1	3.45%
9.1.4.0	1	3.45%
8.5.0.5	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%
Mirapoint (24 servers)
Version	Number of Servers	Percent
4.4.3-GA	5	20.83%
4.4.2a-FCS	3	12.50%
4.4.5-GA	3	12.50%
4.3.5-GA	3	12.50%
4.4.4-GA	2	8.33%
4.4.7-GA	2	8.33%
4.1.9-GA	1	4.17%
4.4.5a-GA	1	4.17%
4.3.6-GA	1	4.17%
3.10.10a-GA	1	4.17%
3.7.5a-GA	1	4.17%
4.4.6-GA	1	4.17%
Other	0	0.00%
OpenVMS (14 servers)
Version	Number of Servers	Percent
8.4	5	35.71%
7.3	5	35.71%
8.3	3	21.43%
8.2	1	7.14%
Other	0	0.00%
Mercury (9 servers)
Version	Number of Servers	Percent
1.48	4	44.44%
3.32	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%
MessageWall (6 servers)
Version	Number of Servers	Percent
1.0.8	6	100.00%
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 (5 servers)
Version	Number of Servers	Percent
3.1.2	2	40.00%
3.1.0	2	40.00%
3.0.7	1	20.00%
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%