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	2,156,910	100.0%
Number of Servers that didn't respond	352,045	16.32%
Server didn't open socket	339,135	15.72%
Server didn't provide banner	12,910	0.60%
Server provided banner	1,804,865	83.68%
Server banner identifies software in use	985,880	45.71%

As indicated by the above table, of the 2,156,910 servers queried, only 985,880 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	358,820	36.40%
Postfix	214,667	21.77%
Microsoft	165,005	16.74%
Sendmail	148,663	15.08%
MailEnable	31,263	3.17%
MDaemon	22,556	2.29%
IMail	12,475	1.27%
Lotus Domino	5,253	0.53%
WinWebMail	4,897	0.50%
Kerio	3,894	0.39%
CommuniGate Pro	3,776	0.38%
XMail	2,593	0.26%
Merak	2,396	0.24%
Qmail Toaster	1,776	0.18%
ArGoSoft	1,375	0.14%
SurgeSMTP	1,349	0.14%
GroupWise	1,238	0.13%
Trend Micro	818	0.08%
Gordano Messaging Suite (GMS)	551	0.06%
Post.Office	538	0.05%
MagicMail	446	0.05%
Mirapoint	369	0.04%
InterScan VirusWall	280	0.03%
VisNetic	274	0.03%
NetIQ MailMarshal	138	0.01%
Interscan	109	0.01%
Mercury	88	0.01%
WebSTAR V	71	0.01%
Neon Mail Server	68	0.01%
ModusMail	31	0.00%
WebSTAR	28	0.00%
MessageWall	27	0.00%
OpenVMS	25	0.00%
MAILsweeper	18	0.00%
OpenSMTPD	5	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (358,820 servers)
Version	Number of Servers	Percent
4.69	307,072	85.58%
4.67	14,526	4.05%
4.63	12,182	3.40%
4.72	6,488	1.81%
4.71	5,304	1.48%
Other	13,248	3.69%
Postfix (214,667 servers)
Version	Number of Servers	Percent
Other	214,667	100.00%
Microsoft (165,005 servers)
Version	Number of Servers	Percent
6.0.3790.4675	106,819	64.74%
6.0.3790.3959	40,751	24.70%
6.0.3790.1830	9,431	5.72%
5.0.2195.7381	2,503	1.52%
5.0.2195.6713	2,197	1.33%
Other	3,304	2.00%
Sendmail (148,663 servers)
Version	Number of Servers	Percent
8.13.1	28,792	19.37%
8.13.8	28,035	18.86%
8.14.4	15,329	10.31%
8.14.3	15,112	10.17%
8.12.11.20060614	9,043	6.08%
8.12.11.20060308	8,911	5.99%
8.13.6.20060614	5,774	3.88%
8.14.2	4,715	3.17%
8.12.10	4,493	3.02%
8.11.6	4,489	3.02%
8.13.6	3,684	2.48%
8.14.1	3,524	2.37%
8.12.11	2,846	1.91%
8.13.4	2,622	1.76%
8.13.7	2,582	1.74%
8.12.8	2,163	1.45%
Other	6,549	4.41%
MailEnable (31,263 servers)
Version	Number of Servers	Percent
1.986--	10,391	33.24%
1.981--	2,906	9.30%
1.983--	1,897	6.07%
3.62--	1,214	3.88%
0-3.63-	910	2.91%
4.23--	876	2.80%
4.22--	743	2.38%
1.96--	533	1.70%
1.95--	493	1.58%
0-1.87-	451	1.44%
0-2.53-	448	1.43%
0-4.23-	400	1.28%
1.9--	399	1.28%
--3.63	389	1.24%
4.14--	356	1.14%
4.17--	349	1.12%
0-3.61-	331	1.06%
0-3.6-	326	1.04%
Other	7,851	25.11%
MDaemon (22,556 servers)
Version	Number of Servers	Percent
11.0.3	5,071	22.48%
10.1.2	1,816	8.05%
10.0.0	1,303	5.78%
10.1.1	1,127	5.00%
11.0.0	1,104	4.89%
9.6.1	823	3.65%
9.6.6	773	3.43%
10.1.0	681	3.02%
11.0.2	601	2.66%
9.6.5	553	2.45%
10.0.5	550	2.44%
9.5.2	519	2.30%
10.0.2	490	2.17%
10.0.4	454	2.01%
11.0.1	428	1.90%
9.6.2	426	1.89%
9.5.1	421	1.87%
9.6.4	411	1.82%
8.1.3	397	1.76%
9.5.6	388	1.72%
9.0.4	354	1.57%
9.5.5	259	1.15%
9.6.3	246	1.09%
6.8.5	235	1.04%
Other	3,126	13.86%
IMail (12,475 servers)
Version	Number of Servers	Percent
8.22	2,383	19.10%
11.02	1,341	10.75%
8.15	1,163	9.32%
11.01	937	7.51%
9.23	910	7.29%
10.02	557	4.46%
8.05	536	4.30%
9.20	495	3.97%
9.10	492	3.94%
11.0	475	3.81%
7.07	352	2.82%
9.21	348	2.79%
7.15	283	2.27%
8.00	268	2.15%
6.06	244	1.96%
8.04	196	1.57%
10.01	176	1.41%
8.10	130	1.04%
8.21	127	1.02%
Other	1,062	8.51%
Lotus Domino (5,253 servers)
Version	Number of Servers	Percent
8.5.1	586	11.16%
8.5	397	7.56%
7.0.2	350	6.66%
8.5.1FP3	260	4.95%
8.5.2	248	4.72%
7.0.3	219	4.17%
8.0.2	200	3.81%
8.0.1	195	3.71%
7.0.1	185	3.52%
8.5.1FP2	167	3.18%
6.5.4	157	2.99%
6.5.1	155	2.95%
8.5.1FP4	138	2.63%
6.5.3	124	2.36%
7.0.3FP1	119	2.27%
8.0	117	2.23%
6.5.5	114	2.17%
7.0	111	2.11%
7.0.2FP2	110	2.09%
8.5.1FP1	93	1.77%
6.5	88	1.68%
8.5FP1	85	1.62%
5.0.11	62	1.18%
7.0.2FP3	55	1.05%
Other	918	17.48%
WinWebMail (4,897 servers)
Version	Number of Servers	Percent
3.8.0.1	1,182	24.14%
3.7.6.1	795	16.23%
3.7.7.3	581	11.86%
3.7.3.1	580	11.84%
3.8.1.1	505	10.31%
3.7.1.1	286	5.84%
3.7.5.1	191	3.90%
3.8.1.3	156	3.19%
3.7.7.1	147	3.00%
3.6.3.1	137	2.80%
3.7.0.5	122	2.49%
3.7.0.3	95	1.94%
3.7.0.7	86	1.76%
Other	34	0.69%
Kerio (3,894 servers)
Version	Number of Servers	Percent
6.7.3	574	14.74%
6.6.2	428	10.99%
6.7.0	411	10.55%
6.7.2	351	9.01%
6.5.0	255	6.55%
6.7.1	224	5.75%
6.5.2	213	5.47%
6.4.1	189	4.85%
6.3.1	186	4.78%
6.5.1	136	3.49%
6.6.0	134	3.44%
6.4.0	127	3.26%
6.4.2	100	2.57%
6.6.1	88	2.26%
6.3.0	70	1.80%
Other	408	10.48%
CommuniGate Pro (3,776 servers)
Version	Number of Servers	Percent
5.1.16	248	6.57%
4.1.8	214	5.67%
5.3.8	201	5.32%
5.2.16	172	4.56%
5.3.9	166	4.40%
4.2.10	142	3.76%
5.3.7	117	3.10%
5.2.19	97	2.57%
5.1.12	91	2.41%
5.2.14	88	2.33%
5.2.12	85	2.25%
5.3.5	84	2.22%
5.2.3	83	2.20%
5.0.14	79	2.09%
5.2.8	75	1.99%
5.2.20	74	1.96%
5.3.2	73	1.93%
5.1.13	73	1.93%
5.2.13	66	1.75%
5.2.10	62	1.64%
5.2.18	59	1.56%
5.1.14	50	1.32%
5.2.11	45	1.19%
5.0.9	43	1.14%
5.1.9	42	1.11%
5.2.9	39	1.03%
5.2.0	38	1.01%
Other	1,170	30.99%
XMail (2,593 servers)
Version	Number of Servers	Percent
1.22	624	24.06%
1.25	604	23.29%
1.26	344	13.27%
1.24	321	12.38%
1.27	223	8.60%
1.21	128	4.94%
1.23	69	2.66%
1.20	66	2.55%
1.17	56	2.16%
1.12	49	1.89%
Other	109	4.20%
Merak (2,396 servers)
Version	Number of Servers	Percent
8.0.3	981	40.94%
8.9.1	239	9.97%
8.5.0	151	6.30%
7.4.5	112	4.67%
7.5.2	109	4.55%
7.6.4	95	3.96%
8.3.8	95	3.96%
8.2.13	48	2.00%
7.4.2	39	1.63%
9.0.0	36	1.50%
7.2.0	33	1.38%
7.6.1	31	1.29%
8.3.15	29	1.21%
7.0.1	26	1.09%
8.2.4	26	1.09%
8.9.0	25	1.04%
Other	321	13.40%
Qmail Toaster (1,776 servers)
Version	Number of Servers	Percent
1.3	1,628	91.67%
1.2	104	5.86%
1.0	30	1.69%
Other	14	0.79%
ArGoSoft (1,375 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	271	19.71%
1.8 (1.8.9.5)	224	16.29%
1.8 (1.8.9.3)	171	12.44%
1.8 (1.8.9.1)	131	9.53%
1.8 (1.8.8.8)	110	8.00%
1.8 (1.8.8.7)	81	5.89%
1.8 (1.8.9.2)	58	4.22%
1.8 (1.8.9.4)	43	3.13%
1.8 (1.8.8.1)	30	2.18%
1.8 (1.8.8.9)	28	2.04%
1.8 (1.8.9.0)	22	1.60%
1.8 (1.8.6.0)	18	1.31%
1.8 (1.8.8.2)	14	1.02%
Other	174	12.65%
SurgeSMTP (1,349 servers)
Version	Number of Servers	Percent
3.9e-1	138	10.23%
5.0e4-4	132	9.79%
4.2d4-4	106	7.86%
4.3g2-2	87	6.45%
3.8k4-4	80	5.93%
4.3g-1	76	5.63%
4.0u4-4	65	4.82%
5.0e3-3	64	4.74%
4.3g4-4	58	4.30%
4.3e-1	51	3.78%
4.2d2-2	47	3.48%
3.8i3-3	35	2.59%
4.2a3-3	31	2.30%
3.7b8-8	27	2.00%
3.8f3-3	25	1.85%
5.0i-1	23	1.70%
3.9c-1	23	1.70%
3.6f5-5	21	1.56%
3.8f2-2	16	1.19%
3.9g2-2	15	1.11%
3.9h-18	14	1.04%
Other	215	15.94%
GroupWise (1,238 servers)
Version	Number of Servers	Percent
7.0.3	321	25.93%
6.5.7	148	11.95%
7.0.2	130	10.50%
8.0.1	127	10.26%
8.0.2	100	8.08%
7.0.1	66	5.33%
6.5.4	59	4.77%
6.5.6	51	4.12%
8.0.0	38	3.07%
6.0.4	38	3.07%
7.0.4	37	2.99%
6.5.1	32	2.58%
6.5.5	20	1.62%
7.0	15	1.21%
Other	56	4.52%
Trend Micro (818 servers)
Version	Number of Servers	Percent
5.7	353	43.15%
5.5	228	27.87%
5.18	136	16.63%
7.0	67	8.19%
7.1	14	1.71%
7	10	1.22%
Other	10	1.22%
Gordano Messaging Suite (GMS) (551 servers)
Version	Number of Servers	Percent
Other	551	100.00%
Post.Office (538 servers)
Version	Number of Servers	Percent
3.5.3	88	16.36%
4.1.0.2	65	12.08%
4.0.1	44	8.18%
3.5.3J	29	5.39%
4.1.1	28	5.20%
3.8.3	25	4.65%
4.1.0.4	18	3.35%
3.1.2J	17	3.16%
3.9.2.3	16	2.97%
3.9.1	15	2.79%
3.6.3	14	2.60%
3.9.2	13	2.42%
3.6.2	13	2.42%
3.8.7.4	13	2.42%
3.1.2	11	2.04%
4.1.0.3	11	2.04%
4.0.1.1	10	1.86%
4.0.0.2	9	1.67%
4.1	8	1.49%
3.9.2.1	8	1.49%
4.1.2.2	8	1.49%
4.0.0.1	7	1.30%
3.9.1.2	6	1.12%
3.9.1.3	6	1.12%
3.5.2	6	1.12%
Other	50	9.29%
MagicMail (446 servers)
Version	Number of Servers	Percent
Other	446	100.00%
Mirapoint (369 servers)
Version	Number of Servers	Percent
3.8.4-GA	36	9.76%
3.10.8-GA	36	9.76%
3.10.5-GA	33	8.94%
3.8.3-GA	28	7.59%
3.10.9-GA	28	7.59%
3.10.7-GA	23	6.23%
4.1.9-GA	18	4.88%
4.1.3-GA	17	4.61%
4.1.8-GA	15	4.07%
3.10.4-GA	14	3.79%
3.10.3-GA	13	3.52%
3.10.6-GA	12	3.25%
3.10.10a-GA	8	2.17%
3.8.2-GA	8	2.17%
4.1.4-GA	8	2.17%
3.8.7a	8	2.17%
3.8.5-GA	7	1.90%
4.1.10-GA	7	1.90%
3.8.6-GA	7	1.90%
3.10.2-GA	6	1.63%
4.1.5-GA	6	1.63%
4.0.5a	4	1.08%
3.7.3a-GA	4	1.08%
3.7.5a-GA	4	1.08%
Other	19	5.15%
InterScan VirusWall (280 servers)
Version	Number of Servers	Percent
Other	280	100.00%
VisNetic (274 servers)
Version	Number of Servers	Percent
9.3.2.0	98	35.77%
9.1.4.1	40	14.60%
5.8.6.6	16	5.84%
8.5.0.8	12	4.38%
5.5.8.3	11	4.01%
8.0.3.1	8	2.92%
6.2.2.0	8	2.92%
7.6.1.0	7	2.55%
8.0.3.0	7	2.55%
8.3.5.0	6	2.19%
7.2.4.1	6	2.19%
8.0.3	6	2.19%
5.4.5.4	6	2.19%
8.3.6	5	1.82%
5.3.5.0	5	1.82%
9.1.4.0	5	1.82%
5.0.2.3	4	1.46%
7.5.3.0	3	1.09%
7.2.4.0	3	1.09%
5.0.2.1	3	1.09%
Other	15	5.47%
NetIQ MailMarshal (138 servers)
Version	Number of Servers	Percent
6.0.3.8	98	71.01%
6.1.3.15	12	8.70%
5.5.6.7	9	6.52%
5.5.6.6	4	2.90%
5.5.4.16	4	2.90%
5.5.6.5	3	2.17%
5.5.3.17	2	1.45%
Other	6	4.35%
Interscan (109 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	18	16.51%
3.81-Build_1022	17	15.60%
3.53 (build 2017)	13	11.93%
3.55 (build 1029)	11	10.09%
3.8-Build_3013	9	8.26%
3.81-Build_1084	7	6.42%
3.55 (build 1020)	6	5.50%
3.53 (build 1493)	4	3.67%
3.53 (build 2011)	4	3.67%
3.52 (build 1375)	4	3.67%
3.53 (build 2013)	3	2.75%
3.53 (build 1494)	2	1.83%
3.8-Build_1080	2	1.83%
Other	9	8.26%
Mercury (88 servers)
Version	Number of Servers	Percent
1.48	47	53.41%
3.32	22	25.00%
3.21c	8	9.09%
3.21	2	2.27%
3.01a	2	2.27%
1.47	2	2.27%
3.30	2	2.27%
1.44	1	1.14%
3.31	1	1.14%
1.49	1	1.14%
Other	0	0.00%
WebSTAR V (71 servers)
Version	Number of Servers	Percent
5.4.1	25	35.21%
5.4.0	18	25.35%
5.3.4	15	21.13%
5.3.2	6	8.45%
5.3.3	5	7.04%
5.3.0	1	1.41%
5.3.1	1	1.41%
Other	0	0.00%
Neon Mail Server (68 servers)
Version	Number of Servers	Percent
3.1.3	20	29.41%
3.0.7	13	19.12%
3.1.4	9	13.24%
3.0.9	9	13.24%
3.1.2	6	8.82%
3.1.0	4	5.88%
3.1.1	3	4.41%
3.1.5	3	4.41%
3.0.6	1	1.47%
Other	0	0.00%
ModusMail (31 servers)
Version	Number of Servers	Percent
4.35.477.0	9	29.03%
4.2.420.0	5	16.13%
4.35.480.0	3	9.68%
4.1.361.21	2	6.45%
3.2.315.0	2	6.45%
3.1.293.1	2	6.45%
3.1.302.0	2	6.45%
4.35.480.11	2	6.45%
4.2.425.22	1	3.23%
4.0.340.3	1	3.23%
4.3.459.0	1	3.23%
4.35.477.8	1	3.23%
Other	0	0.00%
WebSTAR (28 servers)
Version	Number of Servers	Percent
Other	28	100.00%
MessageWall (27 servers)
Version	Number of Servers	Percent
1.0.8	25	92.59%
1.0.6	1	3.70%
1.1.0	1	3.70%
Other	0	0.00%
OpenVMS (25 servers)
Version	Number of Servers	Percent
8.3	14	56.00%
7.3	6	24.00%
8.2	2	8.00%
6.1	1	4.00%
8.4	1	4.00%
7.2	1	4.00%
Other	0	0.00%
MAILsweeper (18 servers)
Version	Number of Servers	Percent
4.3.17.0	4	22.22%
4.3.6.0	4	22.22%
4.3.14.0	3	16.67%
4.3.20.0	3	16.67%
4.3.19.0	1	5.56%
4.3.10.0	1	5.56%
4.3.1.0	1	5.56%
4.2.5.0	1	5.56%
Other	0	0.00%
OpenSMTPD (5 servers)
Version	Number of Servers	Percent
Other	5	100.00%