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	2,394,260	100.0%
Number of Servers that didn't respond	420,074	17.55%
Server didn't open socket	409,679	17.11%
Server didn't provide banner	10,395	0.43%
Server provided banner	1,974,186	82.45%
Server banner identifies software in use	1,110,306	46.37%

As indicated by the above table, of the 2,394,260 servers queried, only 1,110,306 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	567,802	51.14%
Postfix	316,729	28.53%
Sendmail	98,305	8.85%
Microsoft	54,917	4.95%
MailEnable	31,245	2.81%
MDaemon	18,903	1.70%
IMail	5,360	0.48%
Lotus Domino	3,265	0.29%
CommuniGate Pro	2,792	0.25%
WinWebMail	2,497	0.22%
XMail	1,805	0.16%
Qmail Toaster	1,393	0.13%
Kerio	1,155	0.10%
SurgeSMTP	981	0.09%
Merak	851	0.08%
ArGoSoft	499	0.04%
MagicMail	291	0.03%
Post.Office	283	0.03%
GroupWise	277	0.02%
Gordano Messaging Suite (GMS)	262	0.02%
Trend Micro	207	0.02%
InterScan VirusWall	97	0.01%
OpenSMTPD	83	0.01%
Mirapoint	81	0.01%
VisNetic	68	0.01%
Mercury	32	0.00%
Interscan	25	0.00%
WebSTAR V	24	0.00%
OpenVMS	19	0.00%
NetIQ MailMarshal	17	0.00%
Neon Mail Server	14	0.00%
ModusMail	10	0.00%
MessageWall	9	0.00%
WebSTAR	5	0.00%
MAILsweeper	3	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (567,802 servers)
Version	Number of Servers	Percent
4.82	287,022	50.55%
4.80.1	128,682	22.66%
4.80	77,090	13.58%
4.76	17,704	3.12%
4.72	17,644	3.11%
4.69	13,172	2.32%
4.77	10,234	1.80%
Other	16,254	2.86%
Postfix (316,729 servers)
Version	Number of Servers	Percent
Other	316,729	100.00%
Sendmail (98,305 servers)
Version	Number of Servers	Percent
8.13.8	23,773	24.18%
8.14.5	17,268	17.57%
8.14.4	14,516	14.77%
8.13.1	13,009	13.23%
8.14.3	9,219	9.38%
8.12.11.20060308	2,984	3.04%
8.13.6.20060614	2,726	2.77%
8.14.2	1,851	1.88%
8.14.7	1,803	1.83%
8.11.6	1,368	1.39%
8.12.10	1,220	1.24%
8.14.1	1,156	1.18%
8.13.6	994	1.01%
Other	6,418	6.53%
Microsoft (54,917 servers)
Version	Number of Servers	Percent
6.0.3790.4675	43,719	79.61%
6.0.3790.3959	5,023	9.15%
7.5.7601.17514	2,165	3.94%
6.0.3790.1830	1,315	2.39%
Other	2,695	4.91%
MailEnable (31,245 servers)
Version	Number of Servers	Percent
1.986--	3,573	11.44%
6.5--	2,420	7.75%
5.10--	1,705	5.46%
4.26--	1,269	4.06%
6.0--	1,191	3.81%
7.06--	845	2.70%
8.00--	837	2.68%
1.981--	686	2.20%
7.07--	640	2.05%
7.50--	621	1.99%
7.0--	563	1.80%
7.53--	539	1.73%
6.57--	525	1.68%
6.70--	500	1.60%
6.03--	430	1.38%
7.55--	391	1.25%
3.62--	373	1.19%
8.01--	346	1.11%
1.983--	336	1.08%
Other	13,455	43.06%
MDaemon (18,903 servers)
Version	Number of Servers	Percent
13.6.2	2,423	12.82%
11.0.3	1,261	6.67%
11.0.0	1,052	5.57%
13.0.4	1,041	5.51%
13.0.5	924	4.89%
13.6.0	918	4.86%
13.6.1	807	4.27%
13.5.2	767	4.06%
13.5.1	564	2.98%
10.0.0	562	2.97%
12.5.6	550	2.91%
13.0.3	479	2.53%
10.1.2	456	2.41%
10.1.1	408	2.16%
13.0.2	342	1.81%
12.5.4	340	1.80%
9.6.1	331	1.75%
10.1.0	313	1.66%
9.6.6	306	1.62%
9.6.2	252	1.33%
9.5.2	199	1.05%
10.0.2	191	1.01%
Other	4,417	23.37%
IMail (5,360 servers)
Version	Number of Servers	Percent
12.3.0.100	911	17.00%
8.22	805	15.02%
12.2.0.235	576	10.75%
11.5	375	7.00%
9.23	314	5.86%
8.15	296	5.52%
8.05	223	4.16%
11.03	197	3.68%
10.02	164	3.06%
12.1.0.270	133	2.48%
11.02	120	2.24%
7.07	118	2.20%
11.01	113	2.11%
7.15	101	1.88%
6.06	96	1.79%
12.2.0.169	94	1.75%
8.00	70	1.31%
11.0	54	1.01%
10.01	54	1.01%
Other	546	10.19%
Lotus Domino (3,265 servers)
Version	Number of Servers	Percent
8.5.3	525	16.08%
8.5.3FP3	183	5.60%
8.5.2	164	5.02%
8.5.3FP2	153	4.69%
8.5.1	144	4.41%
8.5.3FP4	132	4.04%
8.5.3FP6	128	3.92%
8.5.2FP2	116	3.55%
7.0.2	112	3.43%
8.5	109	3.34%
8.5.3FP5	107	3.28%
8.5.3FP1	91	2.79%
8.5.2FP3	82	2.51%
8.5.2FP4	79	2.42%
7.0.3	66	2.02%
8.5.1FP5	64	1.96%
8.0.1	52	1.59%
6.5.3	50	1.53%
7.0	49	1.50%
8.0.2	49	1.50%
8.5.2FP1	49	1.50%
6.5.1	48	1.47%
7.0.1	44	1.35%
6.5.4	44	1.35%
8.0	35	1.07%
6.5	33	1.01%
Other	557	17.06%
CommuniGate Pro (2,792 servers)
Version	Number of Servers	Percent
5.1.16	282	10.10%
6.0.8	207	7.41%
6.0.7	178	6.38%
6.0.5	120	4.30%
5.2.20	100	3.58%
4.1.8	93	3.33%
5.3.13	63	2.26%
5.3.15	58	2.08%
4.2.10	56	2.01%
5.4.11	56	2.01%
5.4.8	54	1.93%
5.0.14	54	1.93%
5.4.4	53	1.90%
6.0.6	52	1.86%
5.4.10	51	1.83%
5.1.12	48	1.72%
5.2.3	46	1.65%
5.2.16	46	1.65%
5.2.19	46	1.65%
5.4.6	45	1.61%
6.0.1	41	1.47%
5.4.1	39	1.40%
6.0.4	38	1.36%
5.4.5	38	1.36%
5.4.0	34	1.22%
5.2.14	28	1.00%
Other	866	31.02%
WinWebMail (2,497 servers)
Version	Number of Servers	Percent
3.8.1.3	448	17.94%
3.8.0.1	251	10.05%
3.7.6.1	228	9.13%
3.8.1.5	185	7.41%
3.8.6.1	182	7.29%
3.8.5.1	166	6.65%
3.8.1.1	166	6.65%
3.7.3.1	137	5.49%
3.7.7.3	123	4.93%
3.9.0.1	116	4.65%
3.8.2.1	108	4.33%
3.7.1.1	79	3.16%
3.7.5.1	60	2.40%
3.8.3.1	51	2.04%
3.8.3.3	44	1.76%
3.6.3.1	32	1.28%
3.7.0.3	26	1.04%
Other	95	3.80%
XMail (1,805 servers)
Version	Number of Servers	Percent
1.27	586	32.47%
1.22	479	26.54%
1.25	260	14.40%
1.26	180	9.97%
1.24	107	5.93%
1.21	51	2.83%
1.23	26	1.44%
1.17	22	1.22%
Other	94	5.21%
Qmail Toaster (1,393 servers)
Version	Number of Servers	Percent
1.3	1,321	94.83%
1.2	38	2.73%
Other	34	2.44%
Kerio (1,155 servers)
Version	Number of Servers	Percent
6.7.3	212	18.35%
6.7.0	116	10.04%
6.6.2	104	9.00%
6.5.0	92	7.97%
6.5.2	79	6.84%
6.7.2	73	6.32%
6.4.1	59	5.11%
6.3.1	57	4.94%
6.7.1	52	4.50%
6.6.1	52	4.50%
6.4.0	44	3.81%
6.5.1	33	2.86%
6.3.0	27	2.34%
6.4.2	22	1.90%
6.6.0	20	1.73%
6.0.10	13	1.13%
Other	100	8.66%
SurgeSMTP (981 servers)
Version	Number of Servers	Percent
6.5a-1	281	28.64%
6.3c2-2	110	11.21%
6.4a-1	107	10.91%
5.2a-1	50	5.10%
5.3h2-2	46	4.69%
6.1c-1	42	4.28%
3.9e-1	34	3.47%
6.0a5-5	22	2.24%
4.0u4-4	16	1.63%
3.8k4-4	15	1.53%
6.5b-55	13	1.33%
3.8i3-3	12	1.22%
6.0a4-4	11	1.12%
5.0e4-4	11	1.12%
4.2d2-2	11	1.12%
3.9h-18	11	1.12%
Other	189	19.27%
Merak (851 servers)
Version	Number of Servers	Percent
8.0.3	316	37.13%
8.9.1	98	11.52%
8.5.0	61	7.17%
8.3.8	48	5.64%
7.6.4	41	4.82%
7.5.2	41	4.82%
7.4.5	36	4.23%
7.6.1	16	1.88%
7.2.0	13	1.53%
7.0.1	13	1.53%
9.0.0	13	1.53%
8.3.15	13	1.53%
8.9.0	12	1.41%
7.4.2	11	1.29%
6.2.1	9	1.06%
Other	110	12.93%
ArGoSoft (499 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	136	27.25%
1.8 (1.8.9.5)	68	13.63%
1.8 (1.8.9.3)	61	12.22%
1.8 (1.8.9.1)	52	10.42%
1.8 (1.8.8.8)	32	6.41%
1.8 (1.8.8.7)	28	5.61%
1.8 (1.8.9.2)	20	4.01%
1.8 (1.8.9.4)	11	2.20%
1.8 (1.8.8.9)	9	1.80%
1.8 (1.8.6.0)	9	1.80%
1.8 (1.8.7.3)	6	1.20%
1.8 (1.8.8.1)	5	1.00%
Other	62	12.42%
MagicMail (291 servers)
Version	Number of Servers	Percent
Other	291	100.00%
Post.Office (283 servers)
Version	Number of Servers	Percent
3.5.3	40	14.13%
4.1.2.4	34	12.01%
4.2.2	21	7.42%
4.1.0.2	21	7.42%
4.1.1	16	5.65%
4.0.1	15	5.30%
3.5.3J	11	3.89%
4.2	11	3.89%
3.9.2.3	10	3.53%
4.1.0.3	8	2.83%
3.1.2J	7	2.47%
4.2.1.3	6	2.12%
4.1.0.4	6	2.12%
3.1.2	5	1.77%
4.1.2.3	5	1.77%
3.5.4	4	1.41%
3.9.1.2	4	1.41%
3.9.1.3	4	1.41%
3.5.1	4	1.41%
3.9.1	4	1.41%
4.2.1.1	4	1.41%
3.9.2	3	1.06%
4.0.1.1	3	1.06%
4.2.1.2	3	1.06%
4.0.0.1	3	1.06%
3.9.2.1	3	1.06%
3.5.2	3	1.06%
3.8.3	3	1.06%
3.8.7.4	3	1.06%
3.9.2.2	3	1.06%
4.1	3	1.06%
Other	13	4.59%
GroupWise (277 servers)
Version	Number of Servers	Percent
7.0.3	44	15.88%
8.0.2	38	13.72%
6.5.7	36	13.00%
7.0.4	24	8.66%
8.0.3	24	8.66%
7.0.2	18	6.50%
12.0.2	15	5.42%
6.5.4	11	3.97%
6.5.6	11	3.97%
6.0.4	7	2.53%
7.0.1	6	2.17%
8.0.1	6	2.17%
8.0.0	6	2.17%
6.5.5	4	1.44%
12.0.1	4	1.44%
6.5.2	3	1.08%
12.0.0	3	1.08%
7.0	3	1.08%
6.0.1	3	1.08%
Other	11	3.97%
Gordano Messaging Suite (GMS) (262 servers)
Version	Number of Servers	Percent
Other	262	100.00%
Trend Micro (207 servers)
Version	Number of Servers	Percent
5.7	85	41.06%
5.5	46	22.22%
5.18	28	13.53%
7.0	21	10.14%
7.1	13	6.28%
8.5	3	1.45%
Other	11	5.31%
InterScan VirusWall (97 servers)
Version	Number of Servers	Percent
Other	97	100.00%
OpenSMTPD (83 servers)
Version	Number of Servers	Percent
Other	83	100.00%
Mirapoint (81 servers)
Version	Number of Servers	Percent
4.3.5-GA	12	14.81%
4.3.6-GA	9	11.11%
4.4.3-GA	6	7.41%
4.2.3-GA	5	6.17%
4.4.4-GA	5	6.17%
4.4.2a-FCS	4	4.94%
4.1.9-GA	4	4.94%
4.1.10-GA	4	4.94%
3.10.10a-GA	3	3.70%
3.10.4-GA	2	2.47%
4.3.3-GA	2	2.47%
4.2.4-GA	2	2.47%
4.4.4b-GA	2	2.47%
4.3.7-GA	2	2.47%
4.1.5-GA	2	2.47%
3.10.7-GA	2	2.47%
3.8.3-GA	2	2.47%
3.8.5-GA	2	2.47%
4.1.3-GA	1	1.23%
3.4.6-GR	1	1.23%
3.8.2-GA	1	1.23%
4.1.6-GA	1	1.23%
3.7.5a-GA	1	1.23%
4.1.4-GA	1	1.23%
3.8.7a	1	1.23%
3.7.3a-GA	1	1.23%
3.8.4-GA	1	1.23%
3.10.2-GA	1	1.23%
4.1.8-GA	1	1.23%
Other	0	0.00%
VisNetic (68 servers)
Version	Number of Servers	Percent
9.3.2.0	17	25.00%
9.1.4.1	7	10.29%
5.5.8.3	4	5.88%
8.5.0.8	4	5.88%
8.0.3.1	3	4.41%
5.0.2.3	3	4.41%
9.1.4.0	3	4.41%
7.2.4.1	3	4.41%
5.0.2.0	2	2.94%
5.8.6.4	2	2.94%
7.6.1.0	2	2.94%
5.4.5.4	2	2.94%
5.8.6.6	2	2.94%
5.3.5.0	2	2.94%
6.2.2.0	1	1.47%
8.3.5.0	1	1.47%
8.0.3	1	1.47%
8.3.0.1	1	1.47%
8.3.0.0	1	1.47%
8.5.0.5	1	1.47%
6.0.7.4	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%
7.5.3.0	1	1.47%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	1.47%
Other	0	0.00%
Mercury (32 servers)
Version	Number of Servers	Percent
1.48	18	56.25%
3.32	10	31.25%
3.21c	2	6.25%
3.21	1	3.12%
4.x	1	3.12%
Other	0	0.00%
Interscan (25 servers)
Version	Number of Servers	Percent
3.81-Build_1022	5	20.00%
3.55 (build 1016)	4	16.00%
3.81-Build_1084	3	12.00%
3.8-Build_3013	2	8.00%
3.55 (build 1029)	2	8.00%
3.53 (build 1493)	2	8.00%
3.5 (build 1294)	1	4.00%
3.55 (build 1020)	1	4.00%
3.53 (build 2011)	1	4.00%
3.53 (build 2013)	1	4.00%
3.53 (build 2017)	1	4.00%
3.8-Build_3045	1	4.00%
3.8-Build_1080	1	4.00%
Other	0	0.00%
WebSTAR V (24 servers)
Version	Number of Servers	Percent
5.4.1	12	50.00%
5.4.0	6	25.00%
5.3.4	3	12.50%
5.3.2	2	8.33%
5.3.3	1	4.17%
Other	0	0.00%
OpenVMS (19 servers)
Version	Number of Servers	Percent
8.3	8	42.11%
8.4	5	26.32%
7.3	5	26.32%
8.2	1	5.26%
Other	0	0.00%
NetIQ MailMarshal (17 servers)
Version	Number of Servers	Percent
6.0.3.8	10	58.82%
5.5.6.5	2	11.76%
5.5.6.6	2	11.76%
5.5.5.6	1	5.88%
5.5.4.17	1	5.88%
5.5.6.7	1	5.88%
Other	0	0.00%
Neon Mail Server (14 servers)
Version	Number of Servers	Percent
3.0.7	5	35.71%
3.1.4	2	14.29%
3.1.2	2	14.29%
3.1.0	2	14.29%
3.1.3	1	7.14%
3.0.6	1	7.14%
3.0.9	1	7.14%
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 (9 servers)
Version	Number of Servers	Percent
1.0.8	8	88.89%
1.0.6	1	11.11%
Other	0	0.00%
WebSTAR (5 servers)
Version	Number of Servers	Percent
Other	5	100.00%
MAILsweeper (3 servers)
Version	Number of Servers	Percent
4.3.17.0	2	66.67%
4.3.20.0	1	33.33%
Other	0	0.00%