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	2,482,496	100.0%
Number of Servers that didn't respond	447,983	18.05%
Server didn't open socket	438,279	17.65%
Server didn't provide banner	9,704	0.39%
Server provided banner	2,034,513	81.95%
Server banner identifies software in use	1,141,779	45.99%

As indicated by the above table, of the 2,482,496 servers queried, only 1,141,779 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	586,216	51.34%
Postfix	337,716	29.58%
Sendmail	96,962	8.49%
Microsoft	48,191	4.22%
MailEnable	31,491	2.76%
MDaemon	19,492	1.71%
IMail	5,079	0.44%
Lotus Domino	3,124	0.27%
CommuniGate Pro	2,830	0.25%
WinWebMail	2,369	0.21%
XMail	1,797	0.16%
Qmail Toaster	1,387	0.12%
Kerio	1,097	0.10%
SurgeSMTP	960	0.08%
Merak	788	0.07%
ArGoSoft	479	0.04%
MagicMail	303	0.03%
Post.Office	287	0.03%
GroupWise	270	0.02%
Gordano Messaging Suite (GMS)	249	0.02%
Trend Micro	191	0.02%
OpenSMTPD	118	0.01%
InterScan VirusWall	88	0.01%
Mirapoint	75	0.01%
VisNetic	66	0.01%
Mercury	27	0.00%
Interscan	24	0.00%
OpenVMS	22	0.00%
WebSTAR V	22	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	4	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (586,216 servers)
Version	Number of Servers	Percent
4.82	422,798	72.12%
4.80.1	62,755	10.71%
4.80	25,990	4.43%
4.76	19,128	3.26%
4.72	16,743	2.86%
4.69	11,133	1.90%
4.77	7,936	1.35%
Other	19,733	3.37%
Postfix (337,716 servers)
Version	Number of Servers	Percent
Other	337,716	100.00%
Sendmail (96,962 servers)
Version	Number of Servers	Percent
8.13.8	22,619	23.33%
8.14.5	19,318	19.92%
8.14.4	14,901	15.37%
8.13.1	12,710	13.11%
8.14.3	7,547	7.78%
8.12.11.20060308	2,819	2.91%
8.13.6.20060614	2,542	2.62%
8.14.7	1,741	1.80%
8.14.2	1,434	1.48%
8.11.6	1,319	1.36%
8.12.10	1,193	1.23%
8.14.1	1,061	1.09%
Other	7,758	8.00%
Microsoft (48,191 servers)
Version	Number of Servers	Percent
6.0.3790.4675	37,752	78.34%
6.0.3790.3959	4,244	8.81%
7.5.7601.17514	2,288	4.75%
6.0.3790.1830	1,145	2.38%
5.0.2195.7381	492	1.02%
7.0.6002.18264	490	1.02%
Other	1,780	3.69%
MailEnable (31,491 servers)
Version	Number of Servers	Percent
1.986--	3,136	9.96%
6.5--	2,378	7.55%
5.10--	1,522	4.83%
4.26--	1,123	3.57%
6.0--	1,121	3.56%
8.04--	1,005	3.19%
8.00--	931	2.96%
7.06--	862	2.74%
8.50--	735	2.33%
1.981--	600	1.91%
7.50--	586	1.86%
7.07--	549	1.74%
6.57--	515	1.64%
7.53--	513	1.63%
7.0--	511	1.62%
6.70--	470	1.49%
8.51--	442	1.40%
6.03--	377	1.20%
8.51--8.51	375	1.19%
Other	13,740	43.63%
MDaemon (19,492 servers)
Version	Number of Servers	Percent
14.0.2	3,310	16.98%
11.0.3	1,224	6.28%
11.0.0	1,030	5.28%
13.0.4	990	5.08%
13.0.5	826	4.24%
14.0.0	725	3.72%
13.6.2	703	3.61%
13.5.1	604	3.10%
12.5.6	539	2.77%
10.0.0	522	2.68%
13.6.0	463	2.38%
10.1.2	437	2.24%
13.5.2	400	2.05%
10.1.1	374	1.92%
12.5.4	351	1.80%
13.6.1	333	1.71%
13.0.3	333	1.71%
9.6.1	304	1.56%
10.1.0	298	1.53%
13.0.2	294	1.51%
9.6.6	285	1.46%
9.6.2	259	1.33%
9.5.2	195	1.00%
Other	4,693	24.08%
IMail (5,079 servers)
Version	Number of Servers	Percent
12.3.0.100	743	14.63%
8.22	585	11.52%
12.2.0.235	466	9.18%
11.5	326	6.42%
9.23	305	6.01%
8.15	252	4.96%
12.4.0.166	220	4.33%
8.05	219	4.31%
11.01	165	3.25%
12.4.1.15	156	3.07%
11.03	156	3.07%
12.4.1.9	150	2.95%
12.1.0.270	133	2.62%
10.02	109	2.15%
11.02	109	2.15%
7.15	92	1.81%
6.06	92	1.81%
7.07	70	1.38%
12.2.0.169	63	1.24%
8.00	58	1.14%
10.01	57	1.12%
Other	553	10.89%
Lotus Domino (3,124 servers)
Version	Number of Servers	Percent
8.5.3	508	16.26%
8.5.2	174	5.57%
8.5.3FP6	165	5.28%
8.5.3FP3	160	5.12%
8.5.3FP2	130	4.16%
8.5.1	127	4.07%
8.5.3FP4	122	3.91%
7.0.2	112	3.59%
8.5.3FP5	97	3.10%
8.5.2FP2	96	3.07%
8.5	91	2.91%
8.5.3FP1	90	2.88%
8.5.2FP3	86	2.75%
8.5.2FP4	81	2.59%
7.0.3	65	2.08%
8.5.1FP5	52	1.66%
7.0	49	1.57%
8.0.2	47	1.50%
6.5.3	45	1.44%
7.0.1	44	1.41%
8.0.1	44	1.41%
6.5.1	41	1.31%
8.5.2FP1	40	1.28%
6.5.4	40	1.28%
8.0	40	1.28%
6.5	34	1.09%
Other	544	17.41%
CommuniGate Pro (2,830 servers)
Version	Number of Servers	Percent
5.1.16	280	9.89%
6.0.9	270	9.54%
6.0.8	146	5.16%
6.0.7	143	5.05%
5.2.20	100	3.53%
4.1.8	95	3.36%
6.0.5	81	2.86%
5.4.11	79	2.79%
5.3.13	61	2.16%
5.3.15	60	2.12%
5.0.14	57	2.01%
4.2.10	54	1.91%
5.2.3	48	1.70%
5.2.19	47	1.66%
5.4.4	47	1.66%
5.4.8	44	1.55%
5.2.16	44	1.55%
6.0.6	40	1.41%
6.0.1	40	1.41%
5.4.1	40	1.41%
5.4.6	39	1.38%
5.4.10	37	1.31%
5.1.12	32	1.13%
5.4.5	31	1.10%
6.0.4	29	1.02%
Other	886	31.31%
WinWebMail (2,369 servers)
Version	Number of Servers	Percent
3.8.1.3	418	17.64%
3.8.0.1	227	9.58%
3.9.0.1	218	9.20%
3.7.6.1	216	9.12%
3.8.1.5	169	7.13%
3.8.6.1	142	5.99%
3.8.5.1	136	5.74%
3.8.1.1	133	5.61%
3.7.3.1	130	5.49%
3.7.7.3	117	4.94%
3.8.2.1	89	3.76%
3.7.1.1	67	2.83%
3.8.3.1	47	1.98%
3.7.5.1	45	1.90%
3.8.3.3	42	1.77%
3.7.0.3	27	1.14%
3.7.0.5	25	1.06%
3.6.3.1	24	1.01%
3.9.0.3	24	1.01%
Other	73	3.08%
XMail (1,797 servers)
Version	Number of Servers	Percent
1.27	605	33.67%
1.22	492	27.38%
1.25	241	13.41%
1.26	171	9.52%
1.24	105	5.84%
1.21	51	2.84%
1.23	27	1.50%
1.17	20	1.11%
1.20	18	1.00%
Other	67	3.73%
Qmail Toaster (1,387 servers)
Version	Number of Servers	Percent
1.3	1,313	94.66%
1.2	35	2.52%
Other	39	2.81%
Kerio (1,097 servers)
Version	Number of Servers	Percent
6.7.3	206	18.78%
6.7.0	110	10.03%
6.6.2	97	8.84%
6.5.0	88	8.02%
6.5.2	75	6.84%
6.7.2	72	6.56%
6.4.1	61	5.56%
6.3.1	51	4.65%
6.6.1	49	4.47%
6.7.1	46	4.19%
6.5.1	35	3.19%
6.4.0	32	2.92%
6.3.0	26	2.37%
6.4.2	23	2.10%
6.6.0	20	1.82%
6.2.0	11	1.00%
6.1.3	11	1.00%
Other	84	7.66%
SurgeSMTP (960 servers)
Version	Number of Servers	Percent
6.5a2-2	243	25.31%
6.5a-1	99	10.31%
6.3c2-2	79	8.23%
6.4a-1	76	7.92%
5.2a-1	45	4.69%
5.3h2-2	41	4.27%
6.1c-1	37	3.85%
3.9e-1	30	3.12%
6.0a5-5	21	2.19%
3.8k4-4	21	2.19%
6.7a-1	18	1.88%
4.0u4-4	16	1.67%
6.7b-12	13	1.35%
6.6d-3	10	1.04%
5.0e4-4	10	1.04%
Other	201	20.94%
Merak (788 servers)
Version	Number of Servers	Percent
8.0.3	274	34.77%
8.9.1	105	13.32%
8.5.0	58	7.36%
8.3.8	43	5.46%
7.5.2	37	4.70%
7.4.5	36	4.57%
7.6.4	34	4.31%
7.6.1	16	2.03%
7.2.0	15	1.90%
7.0.1	12	1.52%
8.3.15	12	1.52%
7.4.2	11	1.40%
9.0.0	11	1.40%
8.9.0	10	1.27%
8.2.4	10	1.27%
4.4.2	8	1.02%
Other	96	12.18%
ArGoSoft (479 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	134	27.97%
1.8 (1.8.9.5)	68	14.20%
1.8 (1.8.9.3)	67	13.99%
1.8 (1.8.9.1)	47	9.81%
1.8 (1.8.8.7)	26	5.43%
1.8 (1.8.8.8)	25	5.22%
1.8 (1.8.9.2)	18	3.76%
1.8 (1.8.9.4)	13	2.71%
1.8 (1.8.6.0)	10	2.09%
1.8 (1.8.7.3)	7	1.46%
1.8 (1.8.8.9)	6	1.25%
Other	58	12.11%
MagicMail (303 servers)
Version	Number of Servers	Percent
Other	303	100.00%
Post.Office (287 servers)
Version	Number of Servers	Percent
3.5.3	41	14.29%
4.1.2.4	37	12.89%
4.2.2	33	11.50%
4.1.0.2	17	5.92%
4.1.1	17	5.92%
4.0.1	14	4.88%
3.5.3J	10	3.48%
3.9.2.3	10	3.48%
4.1.0.3	8	2.79%
4.2.1.3	8	2.79%
4.2	7	2.44%
3.1.2J	6	2.09%
4.1.2.3	5	1.74%
4.1.0.4	5	1.74%
3.9.1	5	1.74%
3.1.2	4	1.39%
3.5.4	4	1.39%
3.9.2	4	1.39%
3.8.7.4	4	1.39%
3.5.1	4	1.39%
4.2.1.1	4	1.39%
3.9.1.3	3	1.05%
4.2.1.2	3	1.05%
3.9.2.1	3	1.05%
3.5.2	3	1.05%
3.9.1.2	3	1.05%
4.1.2.2	3	1.05%
Other	22	7.67%
GroupWise (270 servers)
Version	Number of Servers	Percent
7.0.3	40	14.81%
6.5.7	33	12.22%
8.0.2	33	12.22%
7.0.4	26	9.63%
8.0.3	22	8.15%
12.0.2	17	6.30%
7.0.2	14	5.19%
6.5.4	11	4.07%
6.5.6	10	3.70%
14.0.0	10	3.70%
6.0.4	8	2.96%
7.0.1	6	2.22%
12.0.1	5	1.85%
6.5.5	5	1.85%
8.0.1	4	1.48%
8.0.0	4	1.48%
6.5.2	3	1.11%
6.5.0	3	1.11%
12.0.0	3	1.11%
6.0.1	3	1.11%
Other	10	3.70%
Gordano Messaging Suite (GMS) (249 servers)
Version	Number of Servers	Percent
Other	249	100.00%
Trend Micro (191 servers)
Version	Number of Servers	Percent
5.7	76	39.79%
5.5	38	19.90%
5.18	34	17.80%
7.0	16	8.38%
7.1	12	6.28%
8.5	4	2.09%
3.53	3	1.57%
5.15	2	1.05%
Other	6	3.14%
OpenSMTPD (118 servers)
Version	Number of Servers	Percent
Other	118	100.00%
InterScan VirusWall (88 servers)
Version	Number of Servers	Percent
Other	88	100.00%
Mirapoint (75 servers)
Version	Number of Servers	Percent
4.3.5-GA	10	13.33%
4.4.3-GA	8	10.67%
4.3.6-GA	7	9.33%
4.2.3-GA	6	8.00%
4.4.4-GA	6	8.00%
4.4.2a-FCS	5	6.67%
4.1.10-GA	4	5.33%
3.10.10a-GA	3	4.00%
4.3.7-GA	3	4.00%
4.1.9-GA	2	2.67%
4.3.3-GA	2	2.67%
4.4.4b-GA	2	2.67%
4.1.5-GA	2	2.67%
3.10.7-GA	2	2.67%
3.8.3-GA	2	2.67%
3.8.4-GA	2	2.67%
4.1.3-GA	1	1.33%
4.2.4-GA	1	1.33%
3.3.3-GR	1	1.33%
4.1.6-GA	1	1.33%
3.7.5a-GA	1	1.33%
3.8.7a	1	1.33%
3.10.2-GA	1	1.33%
4.1.8-GA	1	1.33%
3.8.5-GA	1	1.33%
Other	0	0.00%
VisNetic (66 servers)
Version	Number of Servers	Percent
9.3.2.0	18	27.27%
9.1.4.1	6	9.09%
8.0.3.1	4	6.06%
6.2.2.0	4	6.06%
7.2.4.1	4	6.06%
8.5.0.8	4	6.06%
5.8.6.6	3	4.55%
9.1.4.0	3	4.55%
5.5.8.3	3	4.55%
8.3.5.0	2	3.03%
8.0.3	2	3.03%
5.0.2.3	2	3.03%
7.6.1.0	2	3.03%
5.3.5.0	2	3.03%
8.3.0.1	1	1.52%
8.5.0.5	1	1.52%
5.4.5.4	1	1.52%
8.0.3.0	1	1.52%
5.0.2.0	1	1.52%
6.0.9.0	1	1.52%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	1.52%
Other	0	0.00%
Mercury (27 servers)
Version	Number of Servers	Percent
1.48	14	51.85%
3.32	11	40.74%
3.21	1	3.70%
4.x	1	3.70%
Other	0	0.00%
Interscan (24 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	4	16.67%
3.81-Build_1022	4	16.67%
3.81-Build_1084	3	12.50%
3.8-Build_3013	3	12.50%
3.55 (build 1029)	3	12.50%
3.53 (build 1493)	2	8.33%
3.5 (build 1294)	1	4.17%
3.51 (build 1337)	1	4.17%
3.53 (build 2013)	1	4.17%
3.53 (build 2017)	1	4.17%
3.8-Build_1080	1	4.17%
Other	0	0.00%
OpenVMS (22 servers)
Version	Number of Servers	Percent
8.3	8	36.36%
8.4	7	31.82%
7.3	6	27.27%
8.2	1	4.55%
Other	0	0.00%
WebSTAR V (22 servers)
Version	Number of Servers	Percent
5.4.1	10	45.45%
5.4.0	7	31.82%
5.3.4	3	13.64%
5.3.3	1	4.55%
5.3.2	1	4.55%
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	4	28.57%
3.1.4	3	21.43%
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 (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%