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	2,392,180	100.0%
Number of Servers that didn't respond	421,510	17.62%
Server didn't open socket	411,664	17.21%
Server didn't provide banner	9,846	0.41%
Server provided banner	1,970,670	82.38%
Server banner identifies software in use	1,099,941	45.98%

As indicated by the above table, of the 2,392,180 servers queried, only 1,099,941 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	552,338	50.22%
Postfix	307,974	28.00%
Sendmail	103,274	9.39%
Microsoft	61,950	5.63%
MailEnable	31,583	2.87%
MDaemon	19,424	1.77%
IMail	5,733	0.52%
Lotus Domino	3,521	0.32%
CommuniGate Pro	2,837	0.26%
WinWebMail	2,559	0.23%
XMail	1,870	0.17%
Qmail Toaster	1,429	0.13%
Kerio	1,178	0.11%
SurgeSMTP	976	0.09%
Merak	907	0.08%
ArGoSoft	519	0.05%
GroupWise	309	0.03%
MagicMail	294	0.03%
Post.Office	279	0.03%
Gordano Messaging Suite (GMS)	258	0.02%
Trend Micro	235	0.02%
Mirapoint	94	0.01%
InterScan VirusWall	90	0.01%
VisNetic	84	0.01%
OpenSMTPD	65	0.01%
Mercury	34	0.00%
Interscan	25	0.00%
OpenVMS	21	0.00%
WebSTAR V	20	0.00%
NetIQ MailMarshal	17	0.00%
Neon Mail Server	16	0.00%
MessageWall	11	0.00%
ModusMail	8	0.00%
WebSTAR	5	0.00%
MAILsweeper	4	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (552,338 servers)
Version	Number of Servers	Percent
4.82	205,005	37.12%
4.80.1	147,372	26.68%
4.80	119,254	21.59%
4.72	18,692	3.38%
4.76	17,291	3.13%
4.69	14,558	2.64%
4.77	11,428	2.07%
Other	18,738	3.39%
Postfix (307,974 servers)
Version	Number of Servers	Percent
Other	307,974	100.00%
Sendmail (103,274 servers)
Version	Number of Servers	Percent
8.13.8	25,912	25.09%
8.13.1	14,199	13.75%
8.14.4	14,157	13.71%
8.14.5	13,703	13.27%
8.14.3	13,496	13.07%
8.12.11.20060308	3,469	3.36%
8.13.6.20060614	2,873	2.78%
8.14.2	2,118	2.05%
8.14.7	1,576	1.53%
8.11.6	1,515	1.47%
8.12.10	1,358	1.31%
8.14.1	1,261	1.22%
8.13.6	1,086	1.05%
Other	6,551	6.34%
Microsoft (61,950 servers)
Version	Number of Servers	Percent
6.0.3790.4675	49,730	80.27%
6.0.3790.3959	5,821	9.40%
7.5.7601.17514	2,100	3.39%
6.0.3790.1830	1,540	2.49%
Other	2,759	4.45%
MailEnable (31,583 servers)
Version	Number of Servers	Percent
1.986--	3,997	12.66%
6.5--	2,396	7.59%
5.10--	1,869	5.92%
4.26--	1,402	4.44%
6.0--	1,253	3.97%
7.06--	826	2.62%
1.981--	773	2.45%
7.50--	636	2.01%
7.07--	617	1.95%
7.0--	575	1.82%
6.70--	544	1.72%
6.57--	495	1.57%
7.55--	492	1.56%
6.03--	473	1.50%
7.53--	419	1.33%
3.62--	411	1.30%
1.983--	381	1.21%
7.09--	378	1.20%
7.55-7.55-	363	1.15%
0-3.65-	331	1.05%
5.51--	326	1.03%
Other	12,626	39.98%
MDaemon (19,424 servers)
Version	Number of Servers	Percent
13.6.0	2,738	14.10%
11.0.3	1,378	7.09%
13.5.2	1,274	6.56%
11.0.0	1,111	5.72%
13.0.4	1,103	5.68%
13.0.5	1,021	5.26%
13.5.1	657	3.38%
10.0.0	620	3.19%
13.0.3	608	3.13%
12.5.6	564	2.90%
10.1.2	499	2.57%
10.1.1	484	2.49%
13.0.2	377	1.94%
12.5.4	363	1.87%
9.6.1	352	1.81%
10.1.0	342	1.76%
9.6.6	326	1.68%
9.6.2	257	1.32%
9.5.2	221	1.14%
10.0.5	204	1.05%
12.5.8	204	1.05%
10.0.2	202	1.04%
12.0.3	201	1.03%
Other	4,318	22.23%
IMail (5,733 servers)
Version	Number of Servers	Percent
8.22	926	16.15%
12.3.0.100	836	14.58%
12.2.0.235	653	11.39%
11.5	413	7.20%
8.15	330	5.76%
9.23	316	5.51%
8.05	244	4.26%
11.03	232	4.05%
10.02	166	2.90%
12.1.0.270	138	2.41%
11.02	128	2.23%
7.07	122	2.13%
11.01	108	1.88%
7.15	105	1.83%
6.06	105	1.83%
12.2.0.169	103	1.80%
8.00	82	1.43%
10.01	72	1.26%
11.0	64	1.12%
Other	590	10.29%
Lotus Domino (3,521 servers)
Version	Number of Servers	Percent
8.5.3	598	16.98%
8.5.3FP3	209	5.94%
8.5.2	190	5.40%
8.5.3FP2	171	4.86%
8.5.3FP4	163	4.63%
8.5.3FP5	148	4.20%
8.5.1	141	4.00%
8.5.2FP2	132	3.75%
7.0.2	124	3.52%
8.5.3FP1	117	3.32%
8.5	113	3.21%
8.5.2FP3	97	2.75%
8.5.2FP4	83	2.36%
7.0.3	72	2.04%
8.5.1FP5	65	1.85%
7.0	56	1.59%
8.5.2FP1	56	1.59%
6.5.3	55	1.56%
8.0.1	55	1.56%
6.5.4	49	1.39%
6.5.1	48	1.36%
8.0.2	47	1.33%
7.0.1	46	1.31%
6.5.5	45	1.28%
8.0	44	1.25%
Other	597	16.96%
CommuniGate Pro (2,837 servers)
Version	Number of Servers	Percent
5.1.16	265	9.34%
6.0.7	241	8.49%
6.0.5	132	4.65%
5.2.20	102	3.60%
4.1.8	100	3.52%
6.0.6	78	2.75%
5.4.10	74	2.61%
5.3.13	71	2.50%
5.3.15	60	2.11%
5.4.6	59	2.08%
4.2.10	58	2.04%
5.4.8	55	1.94%
6.0.1	55	1.94%
5.4.4	55	1.94%
5.0.14	53	1.87%
5.2.19	50	1.76%
5.1.12	48	1.69%
5.4.1	46	1.62%
5.2.3	44	1.55%
5.2.16	42	1.48%
6.0.4	39	1.37%
5.4.5	36	1.27%
5.4.0	32	1.13%
5.2.14	31	1.09%
5.4.2	30	1.06%
5.4.7	29	1.02%
Other	952	33.56%
WinWebMail (2,559 servers)
Version	Number of Servers	Percent
3.8.1.3	484	18.91%
3.8.0.1	281	10.98%
3.7.6.1	241	9.42%
3.8.5.1	202	7.89%
3.8.1.5	193	7.54%
3.8.1.1	182	7.11%
3.8.6.1	180	7.03%
3.7.3.1	149	5.82%
3.7.7.3	131	5.12%
3.8.2.1	107	4.18%
3.7.1.1	81	3.17%
3.7.5.1	58	2.27%
3.8.3.1	52	2.03%
3.8.3.3	49	1.91%
3.7.0.5	33	1.29%
3.6.3.1	33	1.29%
3.7.0.3	30	1.17%
Other	73	2.85%
XMail (1,870 servers)
Version	Number of Servers	Percent
1.27	611	32.67%
1.22	481	25.72%
1.25	273	14.60%
1.26	175	9.36%
1.24	122	6.52%
1.21	57	3.05%
1.23	28	1.50%
1.17	26	1.39%
1.20	20	1.07%
Other	77	4.12%
Qmail Toaster (1,429 servers)
Version	Number of Servers	Percent
1.3	1,364	95.45%
1.2	35	2.45%
Other	30	2.10%
Kerio (1,178 servers)
Version	Number of Servers	Percent
6.7.3	211	17.91%
6.7.0	116	9.85%
6.6.2	107	9.08%
6.5.0	91	7.72%
6.5.2	85	7.22%
6.7.2	68	5.77%
6.4.1	62	5.26%
6.3.1	59	5.01%
6.7.1	57	4.84%
6.6.1	50	4.24%
6.4.0	45	3.82%
6.5.1	38	3.23%
6.3.0	27	2.29%
6.4.2	27	2.29%
6.6.0	23	1.95%
6.0.10	17	1.44%
6.2.0	12	1.02%
Other	83	7.05%
SurgeSMTP (976 servers)
Version	Number of Servers	Percent
6.3c2-2	192	19.67%
6.5a-1	141	14.45%
6.4a-1	138	14.14%
5.2a-1	53	5.43%
5.3h2-2	48	4.92%
6.1c-1	46	4.71%
3.9e-1	36	3.69%
6.0a5-5	22	2.25%
3.8k4-4	19	1.95%
4.0u4-4	17	1.74%
6.5b-39	14	1.43%
5.0e4-4	13	1.33%
6.5b-35	13	1.33%
6.0a4-4	12	1.23%
4.2d2-2	11	1.13%
3.9h-18	11	1.13%
4.2a3-3	10	1.02%
3.8i3-3	10	1.02%
Other	170	17.42%
Merak (907 servers)
Version	Number of Servers	Percent
8.0.3	348	38.37%
8.9.1	100	11.03%
8.5.0	62	6.84%
8.3.8	49	5.40%
7.5.2	44	4.85%
7.6.4	37	4.08%
7.4.5	36	3.97%
7.6.1	17	1.87%
7.4.2	14	1.54%
7.6.0	13	1.43%
9.0.0	13	1.43%
8.3.15	13	1.43%
8.9.0	12	1.32%
7.2.0	12	1.32%
8.2.4	11	1.21%
7.0.1	10	1.10%
6.2.1	10	1.10%
Other	106	11.69%
ArGoSoft (519 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	143	27.55%
1.8 (1.8.9.5)	71	13.68%
1.8 (1.8.9.3)	63	12.14%
1.8 (1.8.9.1)	56	10.79%
1.8 (1.8.8.7)	33	6.36%
1.8 (1.8.8.8)	29	5.59%
1.8 (1.8.9.2)	18	3.47%
1.8 (1.8.9.4)	14	2.70%
1.8 (1.8.8.9)	9	1.73%
1.8 (1.8.6.0)	9	1.73%
1.8 (1.8.8.1)	6	1.16%
Other	68	13.10%
GroupWise (309 servers)
Version	Number of Servers	Percent
7.0.3	54	17.48%
8.0.2	44	14.24%
6.5.7	41	13.27%
7.0.4	27	8.74%
7.0.2	19	6.15%
8.0.3	19	6.15%
12.0.2	16	5.18%
6.5.6	13	4.21%
6.5.4	10	3.24%
7.0.1	9	2.91%
6.0.4	8	2.59%
8.0.1	7	2.27%
12.0.1	7	2.27%
8.0.0	6	1.94%
6.5.5	5	1.62%
Other	24	7.77%
MagicMail (294 servers)
Version	Number of Servers	Percent
Other	294	100.00%
Post.Office (279 servers)
Version	Number of Servers	Percent
3.5.3	40	14.34%
4.1.2.4	26	9.32%
4.1.0.2	24	8.60%
4.2.2	19	6.81%
4.0.1	17	6.09%
4.1.1	12	4.30%
3.9.2.3	11	3.94%
3.5.3J	10	3.58%
4.2	9	3.23%
3.1.2J	7	2.51%
4.1.0.4	7	2.51%
3.1.2	6	2.15%
3.9.2	6	2.15%
4.2.1.3	6	2.15%
3.8.3	6	2.15%
4.2.1.1	6	2.15%
4.1.0.3	5	1.79%
3.9.1	5	1.79%
3.5.4	4	1.43%
4.0.1.1	4	1.43%
4.1.2.3	4	1.43%
3.6.2	4	1.43%
3.8.7.4	4	1.43%
3.9.2.2	4	1.43%
3.5.1	4	1.43%
3.9.1.3	3	1.08%
3.9.2.1	3	1.08%
3.9.1.2	3	1.08%
4.1	3	1.08%
Other	17	6.09%
Gordano Messaging Suite (GMS) (258 servers)
Version	Number of Servers	Percent
Other	258	100.00%
Trend Micro (235 servers)
Version	Number of Servers	Percent
5.7	94	40.00%
5.5	52	22.13%
5.18	34	14.47%
7.0	23	9.79%
7.1	17	7.23%
3.53	3	1.28%
Other	12	5.11%
Mirapoint (94 servers)
Version	Number of Servers	Percent
4.3.5-GA	14	14.89%
3.10.10a-GA	10	10.64%
4.3.6-GA	9	9.57%
4.2.3-GA	8	8.51%
4.4.3-GA	8	8.51%
4.1.9-GA	6	6.38%
4.4.2a-FCS	4	4.26%
4.4.4-GA	4	4.26%
4.1.10-GA	4	4.26%
3.10.9-GA	3	3.19%
4.1.5-GA	3	3.19%
4.1.3-GA	2	2.13%
3.8.4-GA	2	2.13%
4.3.3-GA	2	2.13%
4.3.7-GA	2	2.13%
3.8.5-GA	2	2.13%
3.10.8-GA	1	1.06%
3.8.2-GA	1	1.06%
3.3.3-GR	1	1.06%
4.1.6-GA	1	1.06%
3.7.5a-GA	1	1.06%
4.1.4-GA	1	1.06%
3.8.7a	1	1.06%
3.7.3a-GA	1	1.06%
4.2.4-GA	1	1.06%
3.10.2-GA	1	1.06%
4.1.8-GA	1	1.06%
Other	0	0.00%
InterScan VirusWall (90 servers)
Version	Number of Servers	Percent
Other	90	100.00%
VisNetic (84 servers)
Version	Number of Servers	Percent
9.3.2.0	23	27.38%
9.1.4.1	10	11.90%
8.0.3.1	6	7.14%
6.2.2.0	4	4.76%
5.5.8.3	4	4.76%
8.5.0.8	4	4.76%
5.0.2.3	3	3.57%
9.1.4.0	3	3.57%
7.2.4.1	3	3.57%
5.4.5.4	3	3.57%
5.0.2.0	2	2.38%
8.0.3	2	2.38%
7.6.1.0	2	2.38%
8.0.3.0	2	2.38%
5.8.6.4	2	2.38%
5.8.6.6	2	2.38%
5.3.5.0	2	2.38%
8.3.5.0	1	1.19%
8.3.0.1	1	1.19%
8.3.0.0	1	1.19%
8.5.0.5	1	1.19%
9.1.4.1 da-lax-msg mail.davidco.com	1	1.19%
7.5.3.0	1	1.19%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	1.19%
Other	0	0.00%
OpenSMTPD (65 servers)
Version	Number of Servers	Percent
Other	65	100.00%
Mercury (34 servers)
Version	Number of Servers	Percent
1.48	17	50.00%
3.32	12	35.29%
3.21c	2	5.88%
3.21	1	2.94%
4.x	1	2.94%
1.47	1	2.94%
Other	0	0.00%
Interscan (25 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	5	20.00%
3.81-Build_1022	4	16.00%
3.55 (build 1029)	3	12.00%
3.81-Build_1084	2	8.00%
3.8-Build_3013	2	8.00%
3.53 (build 2011)	2	8.00%
3.5 (build 1294)	1	4.00%
3.55 (build 1020)	1	4.00%
3.51 (build 1337)	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%
OpenVMS (21 servers)
Version	Number of Servers	Percent
8.3	10	47.62%
8.4	5	23.81%
7.3	5	23.81%
8.2	1	4.76%
Other	0	0.00%
WebSTAR V (20 servers)
Version	Number of Servers	Percent
5.4.1	11	55.00%
5.4.0	5	25.00%
5.3.4	3	15.00%
5.3.2	1	5.00%
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%
5.5.5.6	1	5.88%
5.5.4.17	1	5.88%
5.5.6.7	1	5.88%
5.5.6.6	1	5.88%
6.1.3.15	1	5.88%
Other	0	0.00%
Neon Mail Server (16 servers)
Version	Number of Servers	Percent
3.0.7	5	31.25%
3.1.2	3	18.75%
3.1.4	2	12.50%
3.1.0	2	12.50%
3.1.3	1	6.25%
3.0.8	1	6.25%
3.1.5	1	6.25%
3.0.6	1	6.25%
Other	0	0.00%
MessageWall (11 servers)
Version	Number of Servers	Percent
1.0.8	10	90.91%
1.0.6	1	9.09%
Other	0	0.00%
ModusMail (8 servers)
Version	Number of Servers	Percent
4.35.477.0	4	50.00%
4.1.361.21	1	12.50%
3.2.315.0	1	12.50%
4.35.477.8	1	12.50%
3.1.302.0	1	12.50%
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%