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	2,015,075	100.0%
Number of Servers that didn't respond	323,789	16.07%
Server didn't open socket	310,313	15.40%
Server didn't provide banner	13,476	0.67%
Server provided banner	1,691,286	83.93%
Server banner identifies software in use	944,009	46.85%

As indicated by the above table, of the 2,015,075 servers queried, only 944,009 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	281,829	29.85%
Microsoft	189,053	20.03%
Postfix	184,417	19.54%
Sendmail	180,058	19.07%
MailEnable	28,776	3.05%
MDaemon	23,097	2.45%
IMail	15,854	1.68%
Kerio	7,326	0.78%
Lotus Domino	5,682	0.60%
WinWebMail	5,417	0.57%
CommuniGate Pro	4,129	0.44%
Merak	3,441	0.36%
XMail	2,689	0.28%
Qmail Toaster	1,844	0.20%
ArGoSoft	1,737	0.18%
GroupWise	1,719	0.18%
SurgeSMTP	1,511	0.16%
Trend Micro	1,430	0.15%
Gordano Messaging Suite (GMS)	721	0.08%
Post.Office	634	0.07%
Mirapoint	449	0.05%
MagicMail	437	0.05%
VisNetic	408	0.04%
InterScan VirusWall	392	0.04%
NetIQ MailMarshal	229	0.02%
Interscan	186	0.02%
WebSTAR V	117	0.01%
Neon Mail Server	112	0.01%
Mercury	104	0.01%
ModusMail	58	0.01%
MessageWall	52	0.01%
WebSTAR	38	0.00%
MAILsweeper	34	0.00%
OpenVMS	29	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (281,829 servers)
Version	Number of Servers	Percent
4.69	233,483	82.85%
4.63	14,891	5.28%
4.67	13,373	4.75%
4.66	4,310	1.53%
4.68	3,410	1.21%
4.60	3,150	1.12%
Other	9,212	3.27%
Microsoft (189,053 servers)
Version	Number of Servers	Percent
6.0.3790.3959	159,549	84.39%
6.0.3790.1830	17,006	9.00%
5.0.2195.6713	8,240	4.36%
Other	4,258	2.25%
Postfix (184,417 servers)
Version	Number of Servers	Percent
Other	184,417	100.00%
Sendmail (180,058 servers)
Version	Number of Servers	Percent
8.13.1	34,493	19.16%
8.13.8	23,294	12.94%
8.14.3	17,671	9.81%
8.12.11.20060614	15,728	8.73%
8.12.11.20060308	15,463	8.59%
8.13.6	12,492	6.94%
8.13.6.20060614	10,574	5.87%
8.12.10	7,243	4.02%
8.11.6	6,821	3.79%
8.14.2	5,963	3.31%
8.14.1	5,752	3.19%
8.12.11	4,780	2.65%
8.13.4	3,884	2.16%
8.13.7	3,319	1.84%
8.12.8	3,152	1.75%
8.9.3	1,931	1.07%
Other	7,498	4.16%
MailEnable (28,776 servers)
Version	Number of Servers	Percent
1.986--	7,387	25.67%
1.981--	4,274	14.85%
1.983--	2,697	9.37%
3.62--	1,808	6.28%
1.96--	832	2.89%
1.95--	824	2.86%
1.9--	669	2.32%
0-3.61-	606	2.11%
0-3.6-	577	2.01%
1.8--	474	1.65%
0-3.62-	466	1.62%
0-2.53-	460	1.60%
0-3.63-	446	1.55%
0-3.14-	402	1.40%
0-1.87-	395	1.37%
0-2.37-	383	1.33%
--3.63	332	1.15%
--3.61	325	1.13%
0-1.85-	318	1.11%
Other	5,101	17.73%
MDaemon (23,097 servers)
Version	Number of Servers	Percent
10.1.1	5,257	22.76%
10.0.5	1,434	6.21%
10.0.0	1,404	6.08%
9.6.1	1,161	5.03%
9.6.6	1,045	4.52%
10.0.4	951	4.12%
10.1.0	810	3.51%
9.6.5	803	3.48%
9.5.2	733	3.17%
10.0.2	653	2.83%
9.6.4	601	2.60%
8.1.3	593	2.57%
9.5.1	571	2.47%
9.6.2	562	2.43%
9.5.6	542	2.35%
9.0.4	518	2.24%
9.6.3	346	1.50%
7.2.3	327	1.42%
6.8.5	326	1.41%
10.0.1	316	1.37%
9.5.5	282	1.22%
9.0.1	281	1.22%
7.2.0	277	1.20%
10.0.3	238	1.03%
Other	3,066	13.27%
IMail (15,854 servers)
Version	Number of Servers	Percent
8.22	3,158	19.92%
8.15	1,561	9.85%
11.0	1,455	9.18%
10.02	1,250	7.88%
9.23	1,214	7.66%
8.05	840	5.30%
9.10	637	4.02%
9.20	584	3.68%
10.01	569	3.59%
7.07	564	3.56%
9.21	457	2.88%
7.15	402	2.54%
6.06	337	2.13%
8.00	331	2.09%
8.04	331	2.09%
8.21	251	1.58%
10.0	223	1.41%
8.10	194	1.22%
8.01	183	1.15%
9.22	180	1.14%
Other	1,133	7.15%
Kerio (7,326 servers)
Version	Number of Servers	Percent
6.7.0	1,361	18.58%
6.7.1	1,126	15.37%
6.6.2	1,079	14.73%
6.7.2	747	10.20%
6.5.2	432	5.90%
6.5.0	378	5.16%
6.4.1	284	3.88%
6.3.1	265	3.62%
6.6.0	229	3.13%
6.5.1	223	3.04%
6.4.0	172	2.35%
6.6.1	171	2.33%
6.4.2	153	2.09%
6.3.0	122	1.67%
Other	584	7.97%
Lotus Domino (5,682 servers)
Version	Number of Servers	Percent
8.5	746	13.13%
7.0.2	469	8.25%
8.0.2	373	6.56%
8.0.1	322	5.67%
7.0.3	321	5.65%
7.0.1	256	4.51%
8.5FP1	234	4.12%
6.5.4	226	3.98%
6.5.1	202	3.56%
6.5.3	189	3.33%
7.0.3FP1	180	3.17%
7.0.2FP2	180	3.17%
6.5.5	157	2.76%
8.0	152	2.68%
7.0	149	2.62%
6.5	137	2.41%
5.0.11	80	1.41%
8.0.2FP1	76	1.34%
7.0.2FP3	72	1.27%
7.0.2FP1	72	1.27%
6.5.2	71	1.25%
6.5.6	61	1.07%
5.0.12	58	1.02%
Other	899	15.82%
WinWebMail (5,417 servers)
Version	Number of Servers	Percent
3.7.6.1	1,126	20.79%
3.8.0.1	941	17.37%
3.7.3.1	871	16.08%
3.7.7.3	807	14.90%
3.7.1.1	445	8.21%
3.7.5.1	278	5.13%
3.6.3.1	230	4.25%
3.7.7.1	210	3.88%
3.7.0.5	190	3.51%
3.7.0.3	143	2.64%
3.7.0.7	136	2.51%
Other	40	0.74%
CommuniGate Pro (4,129 servers)
Version	Number of Servers	Percent
5.2.16	325	7.87%
4.1.8	292	7.07%
5.2.14	214	5.18%
5.2.12	192	4.65%
5.1.13	187	4.53%
5.1.16	177	4.29%
5.2.13	167	4.04%
4.2.10	167	4.04%
5.1.12	113	2.74%
5.2.3	105	2.54%
5.2.15	105	2.54%
5.2.8	104	2.52%
5.2.10	93	2.25%
5.0.14	83	2.01%
5.2.11	83	2.01%
5.0.13	80	1.94%
5.2.6	70	1.70%
5.0.9	69	1.67%
5.1.14	68	1.65%
5.1.9	60	1.45%
5.2.9	60	1.45%
5.2.5	57	1.38%
5.2.0	51	1.24%
4.2.8	50	1.21%
4.2.9	48	1.16%
5.1.7	47	1.14%
4.2	46	1.11%
4.3.12	42	1.02%
5.2.7	42	1.02%
Other	932	22.57%
Merak (3,441 servers)
Version	Number of Servers	Percent
8.0.3	1,425	41.41%
8.9.1	327	9.50%
8.5.0	222	6.45%
7.4.5	205	5.96%
8.3.8	144	4.18%
7.6.4	140	4.07%
7.5.2	138	4.01%
7.4.2	65	1.89%
7.2.0	52	1.51%
9.0.0	52	1.51%
8.2.13	47	1.37%
7.6.1	40	1.16%
7.0.1	38	1.10%
6.2.1	38	1.10%
8.2.4	37	1.08%
Other	471	13.69%
XMail (2,689 servers)
Version	Number of Servers	Percent
1.25	753	28.00%
1.22	711	26.44%
1.24	438	16.29%
1.26	184	6.84%
1.21	172	6.40%
1.20	83	3.09%
1.23	82	3.05%
1.17	75	2.79%
1.12	59	2.19%
Other	132	4.91%
Qmail Toaster (1,844 servers)
Version	Number of Servers	Percent
1.3	1,625	88.12%
1.2	165	8.95%
1.0	37	2.01%
Other	17	0.92%
ArGoSoft (1,737 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.5)	336	19.34%
1.8 (1.8.9.3)	255	14.68%
1.8 (1.8.9.6)	224	12.90%
1.8 (1.8.9.1)	173	9.96%
1.8 (1.8.8.8)	134	7.71%
1.8 (1.8.8.7)	113	6.51%
1.8 (1.8.9.2)	76	4.38%
1.8 (1.8.9.4)	51	2.94%
1.8 (1.8.8.1)	35	2.01%
1.8 (1.8.6.0)	34	1.96%
1.8 (1.8.8.9)	31	1.78%
1.8 (1.8.9.0)	26	1.50%
1.8 (1.8.8.2)	18	1.04%
Other	231	13.30%
GroupWise (1,719 servers)
Version	Number of Servers	Percent
7.0.3	570	33.16%
7.0.2	233	13.55%
6.5.7	198	11.52%
7.0.1	121	7.04%
8.0.0	119	6.92%
6.5.4	106	6.17%
6.5.6	68	3.96%
6.0.4	62	3.61%
8.0.1	59	3.43%
6.5.1	44	2.56%
6.5.5	34	1.98%
Other	105	6.11%
SurgeSMTP (1,511 servers)
Version	Number of Servers	Percent
4.0u4-4	327	21.64%
3.9e-1	324	21.44%
3.9c-1	125	8.27%
3.8k4-4	99	6.55%
4.0u3-3	81	5.36%
3.8f3-3	42	2.78%
3.7b8-8	42	2.78%
3.8i3-3	41	2.71%
3.6f5-5	38	2.51%
3.9g2-2	34	2.25%
4.2a2-2	31	2.05%
3.9h-65	28	1.85%
3.8f2-2	26	1.72%
3.5b3-3	24	1.59%
3.0c2-2	16	1.06%
Other	233	15.42%
Trend Micro (1,430 servers)
Version	Number of Servers	Percent
5.7	691	48.32%
5.5	419	29.30%
5.18	204	14.27%
7.0	93	6.50%
Other	23	1.61%
Gordano Messaging Suite (GMS) (721 servers)
Version	Number of Servers	Percent
Other	721	100.00%
Post.Office (634 servers)
Version	Number of Servers	Percent
3.5.3	122	19.24%
4.1.0.2	71	11.20%
4.0.1	55	8.68%
3.5.3J	50	7.89%
3.8.3	29	4.57%
3.9.2.3	20	3.15%
4.1.0.4	20	3.15%
3.6.3	18	2.84%
3.1.2J	18	2.84%
3.9.1	17	2.68%
3.9.2	15	2.37%
3.6.2	15	2.37%
3.1.2	13	2.05%
3.8.7.4	13	2.05%
4.1	12	1.89%
4.1.0.3	11	1.74%
4.0.0.1	11	1.74%
4.0.0.2	11	1.74%
3.9.0	10	1.58%
3.8.4	10	1.58%
3.9.1.3	9	1.42%
3.9.2.1	8	1.26%
3.5.2	8	1.26%
4.0.1.1	7	1.10%
Other	61	9.62%
Mirapoint (449 servers)
Version	Number of Servers	Percent
3.8.4-GA	60	13.36%
3.8.3-GA	51	11.36%
3.10.5-GA	42	9.35%
3.10.7-GA	30	6.68%
3.10.4-GA	27	6.01%
3.10.3-GA	22	4.90%
4.1.3-GA	21	4.68%
3.10.6-GA	20	4.45%
3.8.6-GA	19	4.23%
3.8.2-GA	16	3.56%
3.8.7a	16	3.56%
3.7.5a-GA	13	2.90%
3.8.5-GA	12	2.67%
4.1.4-GA	12	2.67%
4.1.5-GA	11	2.45%
4.0.5a	9	2.00%
3.7.3a-GA	9	2.00%
3.10.2-GA	9	2.00%
4.1.6-GA	9	2.00%
3.10.8-GA	7	1.56%
3.7.4b-GA	6	1.34%
4.1.7a-GA	6	1.34%
Other	22	4.90%
MagicMail (437 servers)
Version	Number of Servers	Percent
Other	437	100.00%
VisNetic (408 servers)
Version	Number of Servers	Percent
9.3.2.0	152	37.25%
9.1.4.1	50	12.25%
5.8.6.6	20	4.90%
5.0.2.3	14	3.43%
8.5.0.8	14	3.43%
6.2.2.0	13	3.19%
9.1.4.0	11	2.70%
5.5.8.3	11	2.70%
8.3.6	10	2.45%
5.3.5.0	10	2.45%
8.0.3.0	10	2.45%
8.0.3.1	9	2.21%
7.6.1.0	9	2.21%
7.2.4.1	9	2.21%
8.3.5.0	8	1.96%
5.4.5.4	8	1.96%
8.0.3	6	1.47%
5.8.6.4	5	1.23%
Other	39	9.56%
InterScan VirusWall (392 servers)
Version	Number of Servers	Percent
Other	392	100.00%
NetIQ MailMarshal (229 servers)
Version	Number of Servers	Percent
6.0.3.8	176	76.86%
5.5.6.7	15	6.55%
6.1.3.15	13	5.68%
5.5.4.16	5	2.18%
5.5.6.6	4	1.75%
5.5.6.5	4	1.75%
Other	12	5.24%
Interscan (186 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	38	20.43%
3.81-Build_1022	27	14.52%
3.55 (build 1029)	20	10.75%
3.53 (build 2017)	19	10.22%
3.81-Build_1084	12	6.45%
3.8-Build_3013	11	5.91%
3.53 (build 2011)	11	5.91%
3.53 (build 1493)	9	4.84%
3.53 (build 2013)	7	3.76%
3.55 (build 1020)	7	3.76%
3.52 (build 1375)	4	2.15%
3.51 (build 1337)	3	1.61%
3.53 (build 1494)	2	1.08%
3.81-Build_1055	2	1.08%
3.8-Build_1080	2	1.08%
3.8-Build_3045	2	1.08%
Other	10	5.38%
WebSTAR V (117 servers)
Version	Number of Servers	Percent
5.4.1	40	34.19%
5.4.0	31	26.50%
5.3.4	26	22.22%
5.3.2	11	9.40%
5.3.3	5	4.27%
5.3.1	2	1.71%
Other	2	1.71%
Neon Mail Server (112 servers)
Version	Number of Servers	Percent
3.1.3	27	24.11%
3.0.7	19	16.96%
3.1.4	15	13.39%
3.0.9	15	13.39%
3.1.2	11	9.82%
3.1.0	10	8.93%
3.1.5	8	7.14%
3.1.1	3	2.68%
3.0.8	2	1.79%
Other	2	1.79%
Mercury (104 servers)
Version	Number of Servers	Percent
1.48	53	50.96%
3.32	32	30.77%
3.21c	9	8.65%
1.44	2	1.92%
3.21	2	1.92%
1.47	2	1.92%
1.49	2	1.92%
Other	2	1.92%
ModusMail (58 servers)
Version	Number of Servers	Percent
3.2.315.0	17	29.31%
4.35.477.0	10	17.24%
4.35.480.0	7	12.07%
3.1.302.0	6	10.34%
4.2.420.0	5	8.62%
4.1.361.21	3	5.17%
3.1.293.1	2	3.45%
4.35.480.11	2	3.45%
4.2.425.22	1	1.72%
4.1.361.0	1	1.72%
4.2.425.4	1	1.72%
4.0.340.3	1	1.72%
4.3.459.0	1	1.72%
4.35.477.8	1	1.72%
Other	0	0.00%
MessageWall (52 servers)
Version	Number of Servers	Percent
1.0.8	34	65.38%
1.0.11	15	28.85%
1.1.0	2	3.85%
1.0.6	1	1.92%
Other	0	0.00%
WebSTAR (38 servers)
Version	Number of Servers	Percent
Other	38	100.00%
MAILsweeper (34 servers)
Version	Number of Servers	Percent
4.3.20.0	12	35.29%
4.3.14.0	6	17.65%
4.3.17.0	4	11.76%
4.3.1.0	3	8.82%
4.3.19.0	2	5.88%
4.2.10.0	2	5.88%
4.3.6.0	2	5.88%
4.3.10.0	1	2.94%
4.3.12.0	1	2.94%
4.2.5.0	1	2.94%
Other	0	0.00%
OpenVMS (29 servers)
Version	Number of Servers	Percent
8.3	18	62.07%
7.3	6	20.69%
8.2	2	6.90%
7.2	2	6.90%
6.1	1	3.45%
Other	0	0.00%