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	2,495,213	100.0%
Number of Servers that didn't respond	452,125	18.12%
Server didn't open socket	441,729	17.70%
Server didn't provide banner	10,396	0.42%
Server provided banner	2,043,088	81.88%
Server banner identifies software in use	1,143,747	45.84%

As indicated by the above table, of the 2,495,213 servers queried, only 1,143,747 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	579,370	50.66%
Postfix	334,021	29.20%
Sendmail	100,696	8.80%
Microsoft	55,360	4.84%
MailEnable	31,619	2.76%
MDaemon	19,745	1.73%
IMail	5,431	0.47%
Lotus Domino	3,412	0.30%
CommuniGate Pro	2,897	0.25%
WinWebMail	2,503	0.22%
XMail	1,885	0.16%
Qmail Toaster	1,438	0.13%
Kerio	1,150	0.10%
SurgeSMTP	988	0.09%
Merak	834	0.07%
ArGoSoft	513	0.04%
MagicMail	301	0.03%
Post.Office	300	0.03%
GroupWise	287	0.03%
Gordano Messaging Suite (GMS)	267	0.02%
Trend Micro	227	0.02%
OpenSMTPD	98	0.01%
InterScan VirusWall	94	0.01%
Mirapoint	77	0.01%
VisNetic	68	0.01%
Mercury	31	0.00%
Interscan	29	0.00%
OpenVMS	22	0.00%
WebSTAR V	22	0.00%
NetIQ MailMarshal	18	0.00%
Neon Mail Server	16	0.00%
ModusMail	10	0.00%
MessageWall	8	0.00%
WebSTAR	6	0.00%
MAILsweeper	4	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (579,370 servers)
Version	Number of Servers	Percent
4.82	359,121	61.98%
4.80.1	116,076	20.03%
4.80	29,965	5.17%
4.76	18,318	3.16%
4.72	17,796	3.07%
4.69	12,709	2.19%
4.77	9,312	1.61%
Other	16,073	2.77%
Postfix (334,021 servers)
Version	Number of Servers	Percent
Other	334,021	100.00%
Sendmail (100,696 servers)
Version	Number of Servers	Percent
8.13.8	24,363	24.19%
8.14.5	18,361	18.23%
8.14.4	15,052	14.95%
8.13.1	13,436	13.34%
8.14.3	8,418	8.36%
8.12.11.20060308	3,024	3.00%
8.13.6.20060614	2,744	2.73%
8.14.2	1,889	1.88%
8.14.7	1,821	1.81%
8.11.6	1,425	1.42%
8.12.10	1,270	1.26%
8.14.1	1,155	1.15%
8.13.6	1,028	1.02%
Other	6,710	6.66%
Microsoft (55,360 servers)
Version	Number of Servers	Percent
6.0.3790.4675	43,914	79.32%
6.0.3790.3959	5,009	9.05%
7.5.7601.17514	2,286	4.13%
6.0.3790.1830	1,341	2.42%
Other	2,810	5.08%
MailEnable (31,619 servers)
Version	Number of Servers	Percent
1.986--	3,544	11.21%
6.5--	2,489	7.87%
5.10--	1,685	5.33%
4.26--	1,224	3.87%
6.0--	1,198	3.79%
8.00--	961	3.04%
7.06--	843	2.67%
1.981--	686	2.17%
7.07--	662	2.09%
7.50--	619	1.96%
7.0--	559	1.77%
7.53--	535	1.69%
6.57--	528	1.67%
6.70--	493	1.56%
7.55--	384	1.21%
3.62--	355	1.12%
8.01--	342	1.08%
1.983--	338	1.07%
Other	14,174	44.83%
MDaemon (19,745 servers)
Version	Number of Servers	Percent
13.6.2	1,766	8.94%
14.0.0	1,746	8.84%
11.0.3	1,305	6.61%
11.0.0	1,070	5.42%
13.0.4	1,053	5.33%
13.0.5	919	4.65%
13.6.0	773	3.91%
13.5.2	642	3.25%
13.5.1	601	3.04%
13.6.1	591	2.99%
12.5.6	570	2.89%
10.0.0	561	2.84%
10.1.2	464	2.35%
13.0.3	461	2.33%
10.1.1	418	2.12%
12.5.4	349	1.77%
13.0.2	346	1.75%
9.6.1	330	1.67%
10.1.0	318	1.61%
9.6.6	303	1.53%
9.6.2	254	1.29%
9.5.2	207	1.05%
Other	4,698	23.79%
IMail (5,431 servers)
Version	Number of Servers	Percent
12.3.0.100	891	16.41%
8.22	649	11.95%
12.2.0.235	533	9.81%
11.5	380	7.00%
9.23	323	5.95%
8.15	294	5.41%
8.05	220	4.05%
12.4.0.166	205	3.77%
11.03	179	3.30%
11.01	172	3.17%
10.02	164	3.02%
12.1.0.270	151	2.78%
11.02	122	2.25%
7.07	118	2.17%
6.06	98	1.80%
7.15	97	1.79%
12.2.0.169	97	1.79%
8.00	68	1.25%
10.01	57	1.05%
Other	613	11.29%
Lotus Domino (3,412 servers)
Version	Number of Servers	Percent
8.5.3	566	16.59%
8.5.3FP3	178	5.22%
8.5.2	176	5.16%
8.5.3FP6	150	4.40%
8.5.3FP2	146	4.28%
8.5.1	144	4.22%
8.5.3FP4	138	4.04%
7.0.2	121	3.55%
8.5.2FP2	116	3.40%
8.5.3FP5	109	3.19%
8.5	101	2.96%
8.5.3FP1	99	2.90%
8.5.2FP3	86	2.52%
8.5.2FP4	84	2.46%
7.0.3	66	1.93%
8.5.1FP5	62	1.82%
8.0.1	55	1.61%
7.0	53	1.55%
8.0.2	53	1.55%
8.5.2FP1	51	1.49%
6.5.4	50	1.47%
6.5.3	49	1.44%
7.0.1	47	1.38%
6.5.1	44	1.29%
8.0	40	1.17%
6.5	36	1.06%
Other	592	17.35%
CommuniGate Pro (2,897 servers)
Version	Number of Servers	Percent
5.1.16	283	9.77%
6.0.7	188	6.49%
6.0.8	186	6.42%
6.0.5	124	4.28%
5.2.20	104	3.59%
4.1.8	95	3.28%
6.0.9	68	2.35%
5.3.13	64	2.21%
5.4.11	61	2.11%
5.3.15	59	2.04%
4.2.10	56	1.93%
5.0.14	56	1.93%
5.4.4	53	1.83%
5.1.12	51	1.76%
5.4.10	50	1.73%
5.2.19	50	1.73%
6.0.6	48	1.66%
5.4.8	47	1.62%
5.4.6	47	1.62%
5.2.3	46	1.59%
5.2.16	44	1.52%
6.0.1	42	1.45%
5.4.1	42	1.45%
5.4.5	37	1.28%
6.0.4	36	1.24%
5.2.14	32	1.10%
5.4.0	29	1.00%
Other	899	31.03%
WinWebMail (2,503 servers)
Version	Number of Servers	Percent
3.8.1.3	445	17.78%
3.8.0.1	239	9.55%
3.7.6.1	232	9.27%
3.8.1.5	188	7.51%
3.8.6.1	176	7.03%
3.8.1.1	159	6.35%
3.9.0.1	157	6.27%
3.8.5.1	157	6.27%
3.7.3.1	141	5.63%
3.7.7.3	126	5.03%
3.8.2.1	102	4.08%
3.7.1.1	72	2.88%
3.7.5.1	57	2.28%
3.8.3.1	49	1.96%
3.8.3.3	45	1.80%
3.6.3.1	31	1.24%
3.7.0.3	29	1.16%
3.7.7.1	26	1.04%
Other	72	2.88%
XMail (1,885 servers)
Version	Number of Servers	Percent
1.27	632	33.53%
1.22	492	26.10%
1.25	272	14.43%
1.26	180	9.55%
1.24	104	5.52%
1.21	56	2.97%
1.23	28	1.49%
1.17	23	1.22%
1.20	21	1.11%
Other	77	4.08%
Qmail Toaster (1,438 servers)
Version	Number of Servers	Percent
1.3	1,368	95.13%
1.2	38	2.64%
Other	32	2.23%
Kerio (1,150 servers)
Version	Number of Servers	Percent
6.7.3	209	18.17%
6.7.0	113	9.83%
6.6.2	104	9.04%
6.5.0	92	8.00%
6.5.2	76	6.61%
6.7.2	68	5.91%
6.4.1	63	5.48%
6.3.1	55	4.78%
6.6.1	51	4.43%
6.7.1	50	4.35%
6.4.0	42	3.65%
6.5.1	39	3.39%
6.3.0	28	2.43%
6.6.0	24	2.09%
6.4.2	21	1.83%
6.0.10	14	1.22%
Other	101	8.78%
SurgeSMTP (988 servers)
Version	Number of Servers	Percent
6.5a-1	296	29.96%
6.3c2-2	98	9.92%
6.4a-1	97	9.82%
5.2a-1	51	5.16%
5.3h2-2	44	4.45%
6.1c-1	40	4.05%
3.9e-1	32	3.24%
6.0a5-5	22	2.23%
3.8k4-4	16	1.62%
4.0u4-4	16	1.62%
6.6b-7	14	1.42%
5.0e4-4	13	1.32%
6.6a-1	11	1.11%
4.2d2-2	11	1.11%
3.9h-18	11	1.11%
6.0a4-4	10	1.01%
6.6b-10	10	1.01%
3.8i3-3	10	1.01%
Other	186	18.83%
Merak (834 servers)
Version	Number of Servers	Percent
8.0.3	295	35.37%
8.9.1	103	12.35%
8.5.0	62	7.43%
8.3.8	46	5.52%
7.6.4	41	4.92%
7.5.2	38	4.56%
7.4.5	34	4.08%
7.2.0	16	1.92%
7.6.1	16	1.92%
7.0.1	14	1.68%
7.4.2	12	1.44%
8.9.0	12	1.44%
9.0.0	12	1.44%
8.3.15	12	1.44%
8.2.4	10	1.20%
6.2.1	9	1.08%
Other	102	12.23%
ArGoSoft (513 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	136	26.51%
1.8 (1.8.9.5)	74	14.42%
1.8 (1.8.9.3)	69	13.45%
1.8 (1.8.9.1)	54	10.53%
1.8 (1.8.8.7)	30	5.85%
1.8 (1.8.8.8)	28	5.46%
1.8 (1.8.9.2)	19	3.70%
1.8 (1.8.9.4)	13	2.53%
1.8 (1.8.6.0)	10	1.95%
1.8 (1.8.8.9)	8	1.56%
1.8 (1.8.7.3)	7	1.36%
Other	65	12.67%
MagicMail (301 servers)
Version	Number of Servers	Percent
Other	301	100.00%
Post.Office (300 servers)
Version	Number of Servers	Percent
3.5.3	40	13.33%
4.1.2.4	38	12.67%
4.2.2	25	8.33%
4.1.0.2	23	7.67%
4.1.1	17	5.67%
4.0.1	13	4.33%
3.5.3J	11	3.67%
3.9.2.3	11	3.67%
4.2	10	3.33%
4.1.0.3	8	2.67%
4.2.1.3	8	2.67%
3.1.2J	7	2.33%
4.2.1.1	7	2.33%
4.1.0.4	6	2.00%
3.1.2	5	1.67%
3.9.2	5	1.67%
4.1.2.3	5	1.67%
3.9.1	5	1.67%
3.9.1.2	4	1.33%
3.9.1.3	4	1.33%
3.8.7.4	4	1.33%
3.5.1	4	1.33%
3.5.4	3	1.00%
4.2.1.2	3	1.00%
4.0.0.1	3	1.00%
3.9.2.1	3	1.00%
3.5.2	3	1.00%
3.8.3	3	1.00%
3.9.2.2	3	1.00%
4.1.2.2	3	1.00%
Other	16	5.33%
GroupWise (287 servers)
Version	Number of Servers	Percent
7.0.3	45	15.68%
8.0.2	41	14.29%
6.5.7	33	11.50%
7.0.4	28	9.76%
8.0.3	24	8.36%
12.0.2	19	6.62%
7.0.2	18	6.27%
6.5.4	10	3.48%
6.5.6	10	3.48%
6.0.4	8	2.79%
7.0.1	6	2.09%
8.0.0	6	2.09%
12.0.1	6	2.09%
8.0.1	4	1.39%
6.5.5	4	1.39%
12.0.0	4	1.39%
6.5.2	3	1.05%
14.0.0	3	1.05%
6.0.1	3	1.05%
Other	12	4.18%
Gordano Messaging Suite (GMS) (267 servers)
Version	Number of Servers	Percent
Other	267	100.00%
Trend Micro (227 servers)
Version	Number of Servers	Percent
5.7	90	39.65%
5.5	47	20.70%
5.18	38	16.74%
7.0	23	10.13%
7.1	15	6.61%
8.5	3	1.32%
3.53	3	1.32%
Other	8	3.52%
OpenSMTPD (98 servers)
Version	Number of Servers	Percent
Other	98	100.00%
InterScan VirusWall (94 servers)
Version	Number of Servers	Percent
Other	94	100.00%
Mirapoint (77 servers)
Version	Number of Servers	Percent
4.3.5-GA	11	14.29%
4.3.6-GA	7	9.09%
4.4.3-GA	7	9.09%
4.2.3-GA	6	7.79%
4.4.4-GA	5	6.49%
4.4.2a-FCS	4	5.19%
4.1.10-GA	4	5.19%
3.10.10a-GA	3	3.90%
4.3.7-GA	3	3.90%
3.10.4-GA	2	2.60%
4.1.9-GA	2	2.60%
4.3.3-GA	2	2.60%
4.2.4-GA	2	2.60%
4.4.4b-GA	2	2.60%
4.1.5-GA	2	2.60%
3.10.7-GA	2	2.60%
3.8.3-GA	2	2.60%
3.8.4-GA	2	2.60%
3.8.5-GA	2	2.60%
4.1.3-GA	1	1.30%
3.3.3-GR	1	1.30%
3.7.5a-GA	1	1.30%
4.1.4-GA	1	1.30%
3.8.7a	1	1.30%
3.10.2-GA	1	1.30%
4.1.8-GA	1	1.30%
Other	0	0.00%
VisNetic (68 servers)
Version	Number of Servers	Percent
9.3.2.0	17	25.00%
9.1.4.1	6	8.82%
8.0.3.1	5	7.35%
6.2.2.0	4	5.88%
8.5.0.8	4	5.88%
5.0.2.3	3	4.41%
9.1.4.0	3	4.41%
7.2.4.1	3	4.41%
5.8.6.6	3	4.41%
5.5.8.3	3	4.41%
5.0.2.0	2	2.94%
8.0.3	2	2.94%
7.6.1.0	2	2.94%
5.3.5.0	2	2.94%
8.3.5.0	1	1.47%
8.3.0.1	1	1.47%
8.5.0.5	1	1.47%
5.8.6.4	1	1.47%
5.4.5.4	1	1.47%
8.0.3.0	1	1.47%
9.1.4.1 da-lax-msg mail.davidco.com	1	1.47%
6.0.9.0	1	1.47%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	1.47%
Other	0	0.00%
Mercury (31 servers)
Version	Number of Servers	Percent
1.48	16	51.61%
3.32	11	35.48%
3.21c	2	6.45%
3.21	1	3.23%
4.x	1	3.23%
Other	0	0.00%
Interscan (29 servers)
Version	Number of Servers	Percent
3.81-Build_1022	6	20.69%
3.55 (build 1016)	4	13.79%
3.81-Build_1084	3	10.34%
3.8-Build_3013	3	10.34%
3.55 (build 1029)	3	10.34%
3.53 (build 2011)	2	6.90%
3.53 (build 1493)	2	6.90%
3.5 (build 1294)	1	3.45%
3.55 (build 1020)	1	3.45%
3.51 (build 1337)	1	3.45%
3.53 (build 2013)	1	3.45%
3.53 (build 2017)	1	3.45%
3.8-Build_1080	1	3.45%
Other	0	0.00%
OpenVMS (22 servers)
Version	Number of Servers	Percent
8.3	9	40.91%
8.4	7	31.82%
7.3	5	22.73%
8.2	1	4.55%
Other	0	0.00%
WebSTAR V (22 servers)
Version	Number of Servers	Percent
5.4.1	13	59.09%
5.4.0	6	27.27%
5.3.4	3	13.64%
Other	0	0.00%
NetIQ MailMarshal (18 servers)
Version	Number of Servers	Percent
6.0.3.8	11	61.11%
5.5.6.5	2	11.11%
5.5.6.6	2	11.11%
5.5.5.6	1	5.56%
5.5.4.17	1	5.56%
5.5.6.7	1	5.56%
Other	0	0.00%
Neon Mail Server (16 servers)
Version	Number of Servers	Percent
3.0.7	5	31.25%
3.1.4	2	12.50%
3.1.2	2	12.50%
3.1.3	2	12.50%
3.1.0	2	12.50%
3.0.6	1	6.25%
3.0.8	1	6.25%
3.0.9	1	6.25%
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 (8 servers)
Version	Number of Servers	Percent
1.0.8	7	87.50%
1.0.6	1	12.50%
Other	0	0.00%
WebSTAR (6 servers)
Version	Number of Servers	Percent
Other	6	100.00%
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%