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	2,382,866	100.0%
Number of Servers that didn't respond	434,061	18.22%
Server didn't open socket	423,969	17.79%
Server didn't provide banner	10,092	0.42%
Server provided banner	1,948,805	81.78%
Server banner identifies software in use	1,074,523	45.09%

As indicated by the above table, of the 2,382,866 servers queried, only 1,074,523 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	523,522	48.72%
Postfix	291,990	27.17%
Sendmail	108,351	10.08%
Microsoft	73,628	6.85%
MailEnable	31,764	2.96%
MDaemon	19,741	1.84%
IMail	6,278	0.58%
Lotus Domino	3,997	0.37%
CommuniGate Pro	2,952	0.27%
WinWebMail	2,816	0.26%
XMail	1,974	0.18%
Qmail Toaster	1,491	0.14%
Kerio	1,281	0.12%
Merak	1,042	0.10%
SurgeSMTP	987	0.09%
ArGoSoft	600	0.06%
GroupWise	370	0.03%
Post.Office	330	0.03%
MagicMail	305	0.03%
Gordano Messaging Suite (GMS)	287	0.03%
Trend Micro	256	0.02%
Mirapoint	115	0.01%
InterScan VirusWall	108	0.01%
VisNetic	100	0.01%
Mercury	41	0.00%
OpenSMTPD	39	0.00%
Interscan	34	0.00%
WebSTAR V	22	0.00%
NetIQ MailMarshal	21	0.00%
Neon Mail Server	20	0.00%
OpenVMS	20	0.00%
MessageWall	14	0.00%
WebSTAR	13	0.00%
ModusMail	10	0.00%
MAILsweeper	4	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (523,522 servers)
Version	Number of Servers	Percent
4.80.1	274,038	52.35%
4.80	157,914	30.16%
4.72	22,057	4.21%
4.69	18,459	3.53%
4.76	15,379	2.94%
4.77	13,846	2.64%
Other	21,829	4.17%
Postfix (291,990 servers)
Version	Number of Servers	Percent
Other	291,990	100.00%
Sendmail (108,351 servers)
Version	Number of Servers	Percent
8.13.8	28,299	26.12%
8.13.1	15,240	14.07%
8.14.3	14,749	13.61%
8.14.4	13,123	12.11%
8.14.5	13,048	12.04%
8.12.11.20060308	3,880	3.58%
8.13.6.20060614	3,088	2.85%
8.14.2	2,711	2.50%
8.11.6	1,722	1.59%
8.12.10	1,572	1.45%
8.14.1	1,471	1.36%
8.13.6	1,223	1.13%
8.13.7	1,148	1.06%
Other	7,077	6.53%
Microsoft (73,628 servers)
Version	Number of Servers	Percent
6.0.3790.4675	59,457	80.75%
6.0.3790.3959	7,204	9.78%
7.5.7601.17514	1,980	2.69%
6.0.3790.1830	1,907	2.59%
5.0.2195.7381	741	1.01%
Other	2,339	3.18%
MailEnable (31,764 servers)
Version	Number of Servers	Percent
1.986--	4,859	15.30%
5.10--	2,135	6.72%
6.5--	2,090	6.58%
4.26--	1,648	5.19%
6.0--	1,310	4.12%
1.981--	946	2.98%
7.06--	630	1.98%
6.70--	548	1.73%
1.983--	513	1.62%
6.57--	512	1.61%
3.62--	510	1.61%
7.0--	486	1.53%
5.51--	478	1.50%
6.03--	476	1.50%
0-6.83-	436	1.37%
6.60--	403	1.27%
0-3.65-	352	1.11%
5.11--	336	1.06%
Other	13,096	41.23%
MDaemon (19,741 servers)
Version	Number of Servers	Percent
13.0.5	1,941	9.83%
13.0.4	1,523	7.71%
11.0.3	1,501	7.60%
13.5.1	1,292	6.54%
11.0.0	1,191	6.03%
13.0.3	983	4.98%
13.5.0	697	3.53%
10.0.0	692	3.51%
12.5.6	646	3.27%
10.1.2	576	2.92%
10.1.1	534	2.71%
13.0.2	512	2.59%
9.6.1	399	2.02%
9.6.6	378	1.91%
10.1.0	356	1.80%
12.5.4	354	1.79%
9.6.2	270	1.37%
12.5.8	243	1.23%
9.5.2	241	1.22%
12.0.3	234	1.19%
10.0.2	222	1.12%
10.0.5	218	1.10%
9.6.5	217	1.10%
12.5.3	210	1.06%
9.5.1	201	1.02%
Other	4,110	20.82%
IMail (6,278 servers)
Version	Number of Servers	Percent
8.22	1,045	16.65%
12.2.0.235	725	11.55%
12.3.0.100	592	9.43%
11.5	486	7.74%
8.15	368	5.86%
9.23	367	5.85%
11.03	264	4.21%
8.05	243	3.87%
12.2.0.169	205	3.27%
10.02	203	3.23%
12.1.0.270	168	2.68%
11.01	138	2.20%
7.07	136	2.17%
11.02	128	2.04%
6.06	116	1.85%
7.15	112	1.78%
8.00	96	1.53%
10.01	94	1.50%
11.0	83	1.32%
Other	709	11.29%
Lotus Domino (3,997 servers)
Version	Number of Servers	Percent
8.5.3	680	17.01%
8.5.3FP3	302	7.56%
8.5.2	218	5.45%
8.5.3FP2	217	5.43%
8.5.3FP4	172	4.30%
8.5.2FP2	160	4.00%
8.5.1	159	3.98%
7.0.2	150	3.75%
8.5.3FP1	150	3.75%
8.5	135	3.38%
8.5.2FP3	120	3.00%
8.5.2FP4	94	2.35%
7.0.3	82	2.05%
8.5.1FP5	82	2.05%
7.0	67	1.68%
8.0.1	65	1.63%
8.5.2FP1	62	1.55%
6.5.3	61	1.53%
6.5.1	61	1.53%
6.5.4	60	1.50%
7.0.1	60	1.50%
8.0.2	58	1.45%
6.5.5	48	1.20%
8.0	44	1.10%
6.5	43	1.08%
Other	647	16.19%
CommuniGate Pro (2,952 servers)
Version	Number of Servers	Percent
5.1.16	282	9.55%
6.0.5	186	6.30%
4.1.8	105	3.56%
5.2.20	98	3.32%
6.0.4	89	3.01%
5.4.8	78	2.64%
5.3.13	76	2.57%
5.4.6	75	2.54%
5.4.4	75	2.54%
5.4.10	74	2.51%
6.0.1	72	2.44%
4.2.10	71	2.41%
5.3.15	63	2.13%
5.4.1	62	2.10%
5.2.19	56	1.90%
5.2.3	55	1.86%
5.0.14	55	1.86%
5.1.12	55	1.86%
5.4.5	54	1.83%
5.2.16	51	1.73%
5.4.7	47	1.59%
5.4.3	42	1.42%
5.4.9	38	1.29%
5.4.2	37	1.25%
5.4.0	33	1.12%
Other	1,023	34.65%
WinWebMail (2,816 servers)
Version	Number of Servers	Percent
3.8.1.3	546	19.39%
3.8.0.1	333	11.83%
3.7.6.1	261	9.27%
3.8.1.5	236	8.38%
3.8.5.1	230	8.17%
3.8.1.1	194	6.89%
3.7.3.1	186	6.61%
3.7.7.3	161	5.72%
3.8.2.1	159	5.65%
3.7.1.1	87	3.09%
3.8.3.1	83	2.95%
3.7.5.1	72	2.56%
3.8.3.3	69	2.45%
3.6.3.1	43	1.53%
3.7.0.3	39	1.38%
3.7.7.1	31	1.10%
3.7.0.5	30	1.07%
Other	56	1.99%
XMail (1,974 servers)
Version	Number of Servers	Percent
1.27	606	30.70%
1.22	475	24.06%
1.25	310	15.70%
1.26	212	10.74%
1.24	136	6.89%
1.21	61	3.09%
1.23	35	1.77%
1.20	32	1.62%
1.17	29	1.47%
Other	78	3.95%
Qmail Toaster (1,491 servers)
Version	Number of Servers	Percent
1.3	1,413	94.77%
1.2	42	2.82%
Other	36	2.41%
Kerio (1,281 servers)
Version	Number of Servers	Percent
6.7.3	221	17.25%
6.6.2	126	9.84%
6.7.0	123	9.60%
6.5.0	103	8.04%
6.5.2	88	6.87%
6.7.2	82	6.40%
6.4.1	70	5.46%
6.7.1	69	5.39%
6.3.1	52	4.06%
6.4.0	48	3.75%
6.6.1	42	3.28%
6.5.1	39	3.04%
6.6.0	37	2.89%
6.3.0	26	2.03%
6.4.2	25	1.95%
6.0.10	17	1.33%
Other	113	8.82%
Merak (1,042 servers)
Version	Number of Servers	Percent
8.0.3	412	39.54%
8.9.1	115	11.04%
8.5.0	64	6.14%
7.5.2	48	4.61%
8.3.8	47	4.51%
7.4.5	41	3.93%
7.6.4	40	3.84%
7.0.1	22	2.11%
7.4.2	18	1.73%
9.0.0	17	1.63%
7.6.1	17	1.63%
7.6.0	15	1.44%
8.3.15	15	1.44%
7.2.0	14	1.34%
8.9.0	12	1.15%
6.2.1	11	1.06%
Other	134	12.86%
SurgeSMTP (987 servers)
Version	Number of Servers	Percent
6.3c2-2	316	32.02%
5.3h2-2	68	6.89%
6.1c-1	66	6.69%
5.2a-1	61	6.18%
6.4a-1	47	4.76%
3.9e-1	44	4.46%
6.0a5-5	26	2.63%
4.0u4-4	23	2.33%
3.8k4-4	22	2.23%
4.2d2-2	17	1.72%
6.0a4-4	15	1.52%
5.0e4-4	14	1.42%
3.8i3-3	13	1.32%
4.3g2-2	13	1.32%
6.4b-19	12	1.22%
4.2d4-4	11	1.11%
4.2a3-3	10	1.01%
3.9h-18	10	1.01%
Other	199	20.16%
ArGoSoft (600 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	151	25.17%
1.8 (1.8.9.5)	80	13.33%
1.8 (1.8.9.3)	77	12.83%
1.8 (1.8.9.1)	70	11.67%
1.8 (1.8.8.7)	38	6.33%
1.8 (1.8.8.8)	35	5.83%
1.8 (1.8.9.2)	24	4.00%
1.8 (1.8.9.4)	18	3.00%
1.8 (1.8.8.9)	10	1.67%
1.8 (1.8.6.0)	8	1.33%
1.8 (1.8.7.3)	7	1.17%
1.8 (1.8.8.1)	6	1.00%
Other	76	12.67%
GroupWise (370 servers)
Version	Number of Servers	Percent
7.0.3	66	17.84%
8.0.2	52	14.05%
6.5.7	46	12.43%
7.0.4	34	9.19%
7.0.2	22	5.95%
8.0.3	21	5.68%
6.5.6	16	4.32%
6.5.4	16	4.32%
7.0.1	11	2.97%
6.0.4	10	2.70%
12.0.2	9	2.43%
8.0.1	9	2.43%
12.0.1	8	2.16%
12.0.0	7	1.89%
7.0	7	1.89%
6.5.1	7	1.89%
8.0.0	7	1.89%
6.5.5	5	1.35%
6.5.2	4	1.08%
Other	13	3.51%
Post.Office (330 servers)
Version	Number of Servers	Percent
3.5.3	41	12.42%
4.1.2.4	33	10.00%
4.1.0.2	29	8.79%
4.1.1	18	5.45%
4.0.1	15	4.55%
4.2	12	3.64%
3.5.3J	11	3.33%
4.1.0.3	10	3.03%
3.9.2.3	10	3.03%
4.2.2	10	3.03%
3.1.2J	9	2.73%
3.8.3	9	2.73%
3.1.2	8	2.42%
3.9.2	8	2.42%
4.1.0.4	8	2.42%
4.1.2.3	6	1.82%
3.6.2	6	1.82%
4.2.1.3	6	1.82%
3.9.1	6	1.82%
4.2.1.1	5	1.52%
3.5.4	4	1.21%
3.9.1.2	4	1.21%
4.0.1.1	4	1.21%
4.1	4	1.21%
3.9.1.3	4	1.21%
4.0.0.1	4	1.21%
3.8.7.4	4	1.21%
3.9.2.2	4	1.21%
4.1.2.2	4	1.21%
3.5.1	4	1.21%
Other	30	9.09%
MagicMail (305 servers)
Version	Number of Servers	Percent
Other	305	100.00%
Gordano Messaging Suite (GMS) (287 servers)
Version	Number of Servers	Percent
Other	287	100.00%
Trend Micro (256 servers)
Version	Number of Servers	Percent
5.7	98	38.28%
5.5	57	22.27%
5.18	40	15.62%
7.0	29	11.33%
7.1	20	7.81%
3.53	3	1.17%
Other	9	3.52%
Mirapoint (115 servers)
Version	Number of Servers	Percent
4.3.5-GA	16	13.91%
3.10.10a-GA	13	11.30%
4.2.3-GA	12	10.43%
4.3.6-GA	9	7.83%
3.10.9-GA	7	6.09%
4.1.10-GA	7	6.09%
4.1.9-GA	6	5.22%
4.4.2a-FCS	4	3.48%
3.10.8-GA	4	3.48%
4.3.3-GA	4	3.48%
4.1.3-GA	3	2.61%
3.10.4-GA	3	2.61%
4.2.4-GA	3	2.61%
4.1.8-GA	3	2.61%
4.1.5-GA	3	2.61%
3.7.5a-GA	2	1.74%
3.10.3-GA	2	1.74%
4.3.7-GA	2	1.74%
3.8.3-GA	2	1.74%
4.0.5a	2	1.74%
Other	8	6.96%
InterScan VirusWall (108 servers)
Version	Number of Servers	Percent
Other	108	100.00%
VisNetic (100 servers)
Version	Number of Servers	Percent
9.3.2.0	26	26.00%
9.1.4.1	10	10.00%
8.0.3.1	7	7.00%
5.5.8.3	6	6.00%
7.6.1.0	5	5.00%
5.8.6.6	4	4.00%
6.2.2.0	4	4.00%
5.0.2.3	4	4.00%
7.2.4.1	4	4.00%
8.0.3	3	3.00%
8.0.3.0	3	3.00%
9.1.4.0	3	3.00%
5.4.5.4	3	3.00%
8.5.0.8	3	3.00%
5.8.6.4	2	2.00%
5.3.5.0	2	2.00%
8.3.5.0	1	1.00%
5.0.2.1	1	1.00%
5.0.2.0	1	1.00%
7-6-1-0	1	1.00%
8.3.0.1	1	1.00%
8.3.0.0	1	1.00%
8.5.0.5	1	1.00%
9.1.4.1 da-lax-msg mail.davidco.com	1	1.00%
6.0.9.0	1	1.00%
7.5.3.0	1	1.00%
8.3.6	1	1.00%
Other	0	0.00%
Mercury (41 servers)
Version	Number of Servers	Percent
1.48	21	51.22%
3.32	13	31.71%
1.47	2	4.88%
3.21c	2	4.88%
3.21	1	2.44%
1.44	1	2.44%
4.x	1	2.44%
Other	0	0.00%
OpenSMTPD (39 servers)
Version	Number of Servers	Percent
Other	39	100.00%
Interscan (34 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	7	20.59%
3.81-Build_1022	6	17.65%
3.55 (build 1029)	4	11.76%
3.81-Build_1084	3	8.82%
3.53 (build 1493)	3	8.82%
3.8-Build_3013	2	5.88%
3.53 (build 2011)	2	5.88%
3.53 (build 2017)	2	5.88%
3.5 (build 1294)	1	2.94%
3.51 (build 1337)	1	2.94%
3.53 (build 2013)	1	2.94%
3.8-Build_3045	1	2.94%
3.8-Build_1080	1	2.94%
Other	0	0.00%
WebSTAR V (22 servers)
Version	Number of Servers	Percent
5.4.1	12	54.55%
5.4.0	5	22.73%
5.3.4	3	13.64%
5.3.3	1	4.55%
5.3.2	1	4.55%
Other	0	0.00%
NetIQ MailMarshal (21 servers)
Version	Number of Servers	Percent
6.0.3.8	12	57.14%
5.5.6.7	3	14.29%
5.5.6.5	2	9.52%
5.5.6.6	2	9.52%
5.5.5.6	1	4.76%
5.5.4.17	1	4.76%
Other	0	0.00%
Neon Mail Server (20 servers)
Version	Number of Servers	Percent
3.0.7	6	30.00%
3.1.4	3	15.00%
3.1.3	3	15.00%
3.1.2	2	10.00%
3.0.9	2	10.00%
3.1.0	2	10.00%
3.1.5	1	5.00%
3.0.6	1	5.00%
Other	0	0.00%
OpenVMS (20 servers)
Version	Number of Servers	Percent
8.3	8	40.00%
8.4	7	35.00%
7.3	4	20.00%
8.2	1	5.00%
Other	0	0.00%
MessageWall (14 servers)
Version	Number of Servers	Percent
1.0.8	13	92.86%
1.0.6	1	7.14%
Other	0	0.00%
WebSTAR (13 servers)
Version	Number of Servers	Percent
Other	13	100.00%
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%
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%