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	2,302,619	100.0%
Number of Servers that didn't respond	404,860	17.58%
Server didn't open socket	396,060	17.20%
Server didn't provide banner	8,800	0.38%
Server provided banner	1,897,759	82.42%
Server banner identifies software in use	1,130,429	49.09%

As indicated by the above table, of the 2,302,619 servers queried, only 1,130,429 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	611,869	54.13%
Postfix	368,639	32.61%
Sendmail	69,780	6.17%
MailEnable	27,802	2.46%
Microsoft	20,689	1.83%
MDaemon	16,376	1.45%
IMail	3,423	0.30%
CommuniGate Pro	2,228	0.20%
Lotus Domino	1,859	0.16%
WinWebMail	1,614	0.14%
XMail	1,390	0.12%
Qmail Toaster	1,061	0.09%
SurgeSMTP	819	0.07%
Kerio	703	0.06%
Merak	453	0.04%
ArGoSoft	314	0.03%
OpenSMTPD	297	0.03%
MagicMail	243	0.02%
Post.Office	205	0.02%
GroupWise	175	0.02%
Gordano Messaging Suite (GMS)	173	0.02%
Trend Micro	104	0.01%
InterScan VirusWall	55	0.00%
Mirapoint	39	0.00%
VisNetic	38	0.00%
OpenVMS	15	0.00%
WebSTAR V	13	0.00%
Mercury	13	0.00%
Interscan	11	0.00%
ModusMail	11	0.00%
Neon Mail Server	8	0.00%
MessageWall	5	0.00%
NetIQ MailMarshal	2	0.00%
WebSTAR	2	0.00%
MAILsweeper	1	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (611,869 servers)
Version	Number of Servers	Percent
4.86	418,032	68.32%
4.84	61,274	10.01%
4.85	42,533	6.95%
4.72	17,436	2.85%
4.80	15,829	2.59%
4.76	12,939	2.11%
4.82	12,599	2.06%
4.80.1	12,507	2.04%
Other	18,720	3.06%
Postfix (368,639 servers)
Version	Number of Servers	Percent
Other	368,639	100.00%
Sendmail (69,780 servers)
Version	Number of Servers	Percent
8.14.5	15,390	22.06%
8.14.4	13,881	19.89%
8.13.8	13,641	19.55%
8.13.1	8,216	11.77%
8.14.3	4,315	6.18%
8.14.9	2,503	3.59%
8.14.7	1,567	2.25%
8.12.11.20060308	1,428	2.05%
8.15.2	1,187	1.70%
8.14.2	799	1.15%
Other	6,853	9.82%
MailEnable (27,802 servers)
Version	Number of Servers	Percent
8.60--	2,419	8.70%
9.00--	1,691	6.08%
6.5--	1,669	6.00%
8.53--	1,559	5.61%
1.986--	1,431	5.15%
8.51--	1,092	3.93%
8.04--	772	2.78%
5.10--	754	2.71%
8.60-8.60-	681	2.45%
8.50--	637	2.29%
4.26--	573	2.06%
8.00--	535	1.92%
6.0--	509	1.83%
7.06--	504	1.81%
7.0--	341	1.23%
8.60--8.60	331	1.19%
7.07--	326	1.17%
8.55--	324	1.17%
7.50--	318	1.14%
6.57--	314	1.13%
6.70--	287	1.03%
7.53--	281	1.01%
Other	10,454	37.60%
Microsoft (20,689 servers)
Version	Number of Servers	Percent
6.0.3790.4675	14,539	70.27%
7.5.7601.17514	1,671	8.08%
6.0.3790.3959	1,654	7.99%
8.5.9600.16384	563	2.72%
6.0.3790.1830	451	2.18%
7.0.6002.18264	395	1.91%
8.0.9200.16384	274	1.32%
5.0.2195.7381	245	1.18%
Other	897	4.34%
MDaemon (16,376 servers)
Version	Number of Servers	Percent
15.5.3	2,464	15.05%
15.0.3	1,062	6.49%
15.5.2	841	5.14%
11.0.3	755	4.61%
13.5.1	706	4.31%
11.0.0	694	4.24%
13.0.4	638	3.90%
13.0.5	618	3.77%
15.5.1	444	2.71%
13.6.3	383	2.34%
12.5.6	362	2.21%
10.0.0	326	1.99%
12.5.4	306	1.87%
10.1.2	281	1.72%
14.5.2	265	1.62%
14.0.3	229	1.40%
10.1.1	226	1.38%
15.5.0	210	1.28%
10.1.0	208	1.27%
14.5.3	201	1.23%
15.0.1	177	1.08%
13.6.2	174	1.06%
13.0.2	172	1.05%
9.6.1	169	1.03%
14.0.2	168	1.03%
9.6.6	167	1.02%
Other	4,130	25.22%
IMail (3,423 servers)
Version	Number of Servers	Percent
8.22	340	9.93%
12.5.3.93	303	8.85%
12.5.4.146	262	7.65%
12.4.2.27	252	7.36%
12.4.1.15	242	7.07%
9.23	222	6.49%
12.3.0.100	201	5.87%
8.15	165	4.82%
8.05	142	4.15%
12.2.0.235	105	3.07%
11.03	92	2.69%
11.5	91	2.66%
12.5.3.99	78	2.28%
12.5.1.60	64	1.87%
12.5.2.62	56	1.64%
7.07	52	1.52%
12.4.1.9	52	1.52%
10.02	50	1.46%
11.02	49	1.43%
12.5.0.246	48	1.40%
7.15	44	1.29%
12.1.0.270	43	1.26%
11.01	41	1.20%
6.06	35	1.02%
Other	394	11.51%
CommuniGate Pro (2,228 servers)
Version	Number of Servers	Percent
5.1.16	238	10.68%
6.1.8	131	5.88%
6.0.11	115	5.16%
6.1.7	102	4.58%
6.0.9	96	4.31%
5.4.11	81	3.64%
6.1.5	76	3.41%
5.2.20	75	3.37%
6.1.2	71	3.19%
6.1.6	61	2.74%
5.3.13	47	2.11%
6.0.10	47	2.11%
4.1.8	46	2.06%
5.3.15	45	2.02%
5.2.3	45	2.02%
5.0.14	43	1.93%
6.0.7	39	1.75%
6.1.4	37	1.66%
6.0.5	29	1.30%
5.2.16	29	1.30%
6.0.8	28	1.26%
5.4.8	27	1.21%
5.1.12	24	1.08%
Other	696	31.24%
Lotus Domino (1,859 servers)
Version	Number of Servers	Percent
8.5.3FP6	303	16.30%
8.5.3	263	14.15%
8.5.2	88	4.73%
8.5.1	70	3.77%
7.0.2	63	3.39%
8.5.3FP3	56	3.01%
8.5	55	2.96%
8.5.2FP4	53	2.85%
8.5.3FP2	52	2.80%
8.5.2FP3	48	2.58%
8.5.3FP4	44	2.37%
7.0.3	40	2.15%
8.5.3FP5	40	2.15%
8.5.2FP2	40	2.15%
8.5.3FP1	39	2.10%
7.0.1	32	1.72%
8.0.1	31	1.67%
7.0	29	1.56%
8.5.1FP5	29	1.56%
8.0	29	1.56%
6.5.1	27	1.45%
8.5.2FP1	22	1.18%
8.0.2	21	1.13%
6.5.3	21	1.13%
6.5	19	1.02%
Other	345	18.56%
WinWebMail (1,614 servers)
Version	Number of Servers	Percent
3.9.0.7	331	20.51%
3.8.1.3	265	16.42%
3.7.6.1	126	7.81%
3.9.0.1	123	7.62%
3.8.0.1	110	6.82%
3.8.1.5	87	5.39%
3.8.1.1	76	4.71%
3.8.5.1	72	4.46%
3.7.3.1	72	4.46%
3.8.6.1	56	3.47%
3.7.7.3	55	3.41%
3.7.1.1	46	2.85%
3.8.2.1	39	2.42%
3.8.3.1	24	1.49%
3.7.5.1	20	1.24%
3.8.3.3	18	1.12%
3.7.0.5	17	1.05%
3.9.0.5	17	1.05%
Other	60	3.72%
XMail (1,390 servers)
Version	Number of Servers	Percent
1.27	571	41.08%
1.22	384	27.63%
1.25	147	10.58%
1.26	117	8.42%
1.24	61	4.39%
1.21	32	2.30%
1.23	16	1.15%
1.20	15	1.08%
Other	47	3.38%
Qmail Toaster (1,061 servers)
Version	Number of Servers	Percent
1.3	988	93.12%
1.2	18	1.70%
1.03	14	1.32%
1.03.5	14	1.32%
Other	27	2.54%
SurgeSMTP (819 servers)
Version	Number of Servers	Percent
7.1e-1	163	19.90%
6.9c-1	113	13.80%
6.5a2-2	88	10.74%
6.7c-1	58	7.08%
7.0c2-2	48	5.86%
6.5a-1	33	4.03%
6.3c2-2	28	3.42%
3.9e-1	22	2.69%
6.4a-1	20	2.44%
5.2a-1	17	2.08%
3.8k4-4	16	1.95%
5.3h2-2	13	1.59%
7.1f-9	11	1.34%
6.1c-1	10	1.22%
Other	179	21.86%
Kerio (703 servers)
Version	Number of Servers	Percent
6.7.3	149	21.19%
6.7.0	77	10.95%
6.6.2	59	8.39%
6.5.2	51	7.25%
6.5.0	48	6.83%
6.7.2	40	5.69%
6.4.1	35	4.98%
6.6.1	31	4.41%
6.7.1	29	4.13%
6.3.1	27	3.84%
6.5.1	25	3.56%
6.3.0	19	2.70%
6.4.0	16	2.28%
6.4.2	12	1.71%
6.6.0	11	1.56%
6.1.3	9	1.28%
6.2.0	8	1.14%
5.7.9	8	1.14%
Other	49	6.97%
Merak (453 servers)
Version	Number of Servers	Percent
8.0.3	147	32.45%
8.9.1	65	14.35%
8.5.0	33	7.28%
8.3.8	27	5.96%
7.5.2	23	5.08%
7.4.5	22	4.86%
7.6.4	15	3.31%
7.6.1	13	2.87%
7.0.1	13	2.87%
8.3.15	10	2.21%
7.2.0	8	1.77%
7.4.2	7	1.55%
8.9.0	6	1.32%
6.1.0	5	1.10%
6.0.8	5	1.10%
Other	54	11.92%
ArGoSoft (314 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	102	32.48%
1.8 (1.8.9.5)	37	11.78%
1.8 (1.8.9.3)	35	11.15%
1.8 (1.8.9.1)	33	10.51%
1.8 (1.8.8.8)	15	4.78%
1.8 (1.8.8.7)	15	4.78%
1.8 (1.8.9.2)	10	3.18%
1.8 (1.8.6.0)	7	2.23%
1.8 (1.8.7.3)	6	1.91%
1.8 (1.8.9.4)	6	1.91%
1.8 (1.8.8.2)	4	1.27%
1.8 (1.8.8.9)	4	1.27%
Other	40	12.74%
OpenSMTPD (297 servers)
Version	Number of Servers	Percent
Other	297	100.00%
MagicMail (243 servers)
Version	Number of Servers	Percent
Other	243	100.00%
Post.Office (205 servers)
Version	Number of Servers	Percent
4.2.2	45	21.95%
3.5.3	28	13.66%
4.1.2.4	25	12.20%
4.3	20	9.76%
4.2.1.3	9	4.39%
4.1.0.2	7	3.41%
4.0.1	6	2.93%
4.1.1	6	2.93%
3.1.2J	6	2.93%
3.9.2.3	6	2.93%
4.2.1.1	5	2.44%
3.5.3J	4	1.95%
4.2	4	1.95%
3.9.2	3	1.46%
4.1.2.3	3	1.46%
3.1.2	3	1.46%
3.5.1	3	1.46%
Other	22	10.73%
GroupWise (175 servers)
Version	Number of Servers	Percent
14.0.2	22	12.57%
14.0.1	19	10.86%
8.0.3	19	10.86%
14.2.0	18	10.29%
6.5.7	15	8.57%
7.0.3	14	8.00%
14.0.0	11	6.29%
8.0.2	8	4.57%
7.0.2	7	4.00%
7.0.4	6	3.43%
6.0.4	4	2.29%
6.5.4	3	1.71%
12.0.2	3	1.71%
6.0.3	3	1.71%
6.5.6	3	1.71%
7.0.1	3	1.71%
8.0.1	2	1.14%
12.0.4	2	1.14%
12.0.1	2	1.14%
12.0.3	2	1.14%
12.0.0	2	1.14%
6.0.2	2	1.14%
Other	5	2.86%
Gordano Messaging Suite (GMS) (173 servers)
Version	Number of Servers	Percent
Other	173	100.00%
Trend Micro (104 servers)
Version	Number of Servers	Percent
5.7	43	41.35%
5.5	19	18.27%
5.18	18	17.31%
7.0	8	7.69%
7.1	4	3.85%
8.5	3	2.88%
3.53	3	2.88%
7.5	2	1.92%
Other	4	3.85%
InterScan VirusWall (55 servers)
Version	Number of Servers	Percent
Other	55	100.00%
Mirapoint (39 servers)
Version	Number of Servers	Percent
4.4.3-GA	7	17.95%
4.3.6-GA	5	12.82%
4.4.2a-FCS	4	10.26%
4.4.5-GA	4	10.26%
4.3.5-GA	3	7.69%
4.3.3-GA	2	5.13%
3.10.10a-GA	2	5.13%
4.4.4-GA	2	5.13%
4.1.10-GA	2	5.13%
4.4.7-GA	2	5.13%
4.1.9-GA	1	2.56%
4.4.5a-GA	1	2.56%
3.7.5a-GA	1	2.56%
3.8.4-GA	1	2.56%
3.10.2-GA	1	2.56%
4.4.6-GA	1	2.56%
Other	0	0.00%
VisNetic (38 servers)
Version	Number of Servers	Percent
9.3.2.0	9	23.68%
9.1.4.1	4	10.53%
6.2.2.0	3	7.89%
5.0.2.3	3	7.89%
8.5.0.8	3	7.89%
7.6.1.0	2	5.26%
5.5.8.3	2	5.26%
5.3.5.0	2	5.26%
8.3.0.1	1	2.63%
5.8.6.6	1	2.63%
8.5.0.5	1	2.63%
5.4.5.4	1	2.63%
8.0.3.1	1	2.63%
9.1.4.0	1	2.63%
5.0.2.0	1	2.63%
7.2.4.0	1	2.63%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	2.63%
7.2.4.1	1	2.63%
Other	0	0.00%
OpenVMS (15 servers)
Version	Number of Servers	Percent
8.4	5	33.33%
8.3	5	33.33%
7.3	5	33.33%
Other	0	0.00%
WebSTAR V (13 servers)
Version	Number of Servers	Percent
5.4.1	6	46.15%
5.4.0	4	30.77%
5.3.3	1	7.69%
5.3.4	1	7.69%
5.3.2	1	7.69%
Other	0	0.00%
Mercury (13 servers)
Version	Number of Servers	Percent
3.32	7	53.85%
1.48	4	30.77%
3.21	1	7.69%
4.x	1	7.69%
Other	0	0.00%
Interscan (11 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	3	27.27%
3.81-Build_1084	2	18.18%
3.5 (build 1294)	1	9.09%
3.8-Build_3013	1	9.09%
3.81-Build_1022	1	9.09%
3.53 (build 2013)	1	9.09%
3.55 (build 1029)	1	9.09%
3.8-Build_1080	1	9.09%
Other	0	0.00%
ModusMail (11 servers)
Version	Number of Servers	Percent
4.35.477.0	6	54.55%
4.1.361.21	2	18.18%
3.2.315.0	1	9.09%
4.35.477.8	1	9.09%
3.1.302.0	1	9.09%
Other	0	0.00%
Neon Mail Server (8 servers)
Version	Number of Servers	Percent
3.0.7	3	37.50%
3.1.2	2	25.00%
3.1.0	2	25.00%
3.1.4	1	12.50%
Other	0	0.00%
MessageWall (5 servers)
Version	Number of Servers	Percent
1.0.8	5	100.00%
Other	0	0.00%
NetIQ MailMarshal (2 servers)
Version	Number of Servers	Percent
5.5.6.5	1	50.00%
5.5.6.7	1	50.00%
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%