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	2,110,379	100.0%
Number of Servers that didn't respond	348,800	16.53%
Server didn't open socket	335,509	15.90%
Server didn't provide banner	13,291	0.63%
Server provided banner	1,761,579	83.47%
Server banner identifies software in use	969,016	45.92%

As indicated by the above table, of the 2,110,379 servers queried, only 969,016 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	330,919	34.15%
Postfix	204,695	21.12%
Microsoft	173,063	17.86%
Sendmail	159,574	16.47%
MailEnable	30,374	3.13%
MDaemon	22,642	2.34%
IMail	13,062	1.35%
Lotus Domino	5,361	0.55%
Kerio	4,943	0.51%
WinWebMail	4,761	0.49%
CommuniGate Pro	3,860	0.40%
Merak	2,768	0.29%
XMail	2,611	0.27%
Qmail Toaster	1,737	0.18%
ArGoSoft	1,487	0.15%
SurgeSMTP	1,422	0.15%
GroupWise	1,395	0.14%
Trend Micro	996	0.10%
Gordano Messaging Suite (GMS)	590	0.06%
Post.Office	581	0.06%
MagicMail	454	0.05%
Mirapoint	399	0.04%
VisNetic	317	0.03%
InterScan VirusWall	300	0.03%
NetIQ MailMarshal	169	0.02%
Interscan	136	0.01%
Mercury	94	0.01%
WebSTAR V	82	0.01%
Neon Mail Server	77	0.01%
ModusMail	33	0.00%
MessageWall	32	0.00%
WebSTAR	29	0.00%
MAILsweeper	24	0.00%
OpenVMS	23	0.00%
OpenSMTPD	6	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (330,919 servers)
Version	Number of Servers	Percent
4.69	280,879	84.88%
4.67	14,273	4.31%
4.63	12,820	3.87%
4.71	7,574	2.29%
Other	15,373	4.65%
Postfix (204,695 servers)
Version	Number of Servers	Percent
Other	204,695	100.00%
Microsoft (173,063 servers)
Version	Number of Servers	Percent
6.0.3790.4675	88,755	51.28%
6.0.3790.3959	63,992	36.98%
6.0.3790.1830	11,299	6.53%
5.0.2195.6713	3,212	1.86%
5.0.2195.7381	2,371	1.37%
Other	3,434	1.98%
Sendmail (159,574 servers)
Version	Number of Servers	Percent
8.13.1	30,302	18.99%
8.13.8	26,427	16.56%
8.14.3	15,574	9.76%
8.14.4	12,651	7.93%
8.12.11.20060614	12,331	7.73%
8.12.11.20060308	12,330	7.73%
8.13.6.20060614	6,156	3.86%
8.13.6	5,539	3.47%
8.12.10	5,466	3.43%
8.11.6	5,126	3.21%
8.14.2	5,074	3.18%
8.14.1	3,804	2.38%
8.12.11	3,504	2.20%
8.13.4	2,871	1.80%
8.13.7	2,836	1.78%
8.12.8	2,418	1.52%
Other	7,165	4.49%
MailEnable (30,374 servers)
Version	Number of Servers	Percent
1.986--	9,480	31.21%
1.981--	3,303	10.87%
1.983--	2,128	7.01%
3.62--	1,355	4.46%
0-3.63-	859	2.83%
4.22--	846	2.79%
1.96--	611	2.01%
1.95--	577	1.90%
0-4.22-	496	1.63%
1.9--	459	1.51%
0-2.53-	451	1.48%
0-1.87-	428	1.41%
4.17--	408	1.34%
0-3.61-	404	1.33%
0-3.6-	381	1.25%
--3.63	379	1.25%
4.0--	336	1.11%
0-3.14-	335	1.10%
4.22--4.22	320	1.05%
Other	6,818	22.45%
MDaemon (22,642 servers)
Version	Number of Servers	Percent
11.0.2	2,604	11.50%
10.1.2	2,513	11.10%
10.0.0	1,371	6.06%
10.1.1	1,315	5.81%
11.0.0	1,308	5.78%
11.0.1	1,222	5.40%
9.6.1	914	4.04%
9.6.6	852	3.76%
10.1.0	777	3.43%
10.0.5	659	2.91%
9.6.5	598	2.64%
9.5.2	571	2.52%
10.0.4	525	2.32%
10.0.2	515	2.27%
9.6.4	482	2.13%
9.5.1	482	2.13%
9.6.2	449	1.98%
9.5.6	435	1.92%
8.1.3	432	1.91%
9.0.4	397	1.75%
9.6.3	267	1.18%
6.8.5	265	1.17%
9.5.5	264	1.17%
7.2.3	262	1.16%
9.0.1	237	1.05%
Other	2,926	12.92%
IMail (13,062 servers)
Version	Number of Servers	Percent
8.22	2,450	18.76%
11.01	1,284	9.83%
8.15	1,257	9.62%
9.23	970	7.43%
10.02	747	5.72%
8.05	623	4.77%
11.0	622	4.76%
11.02	520	3.98%
9.20	512	3.92%
9.10	487	3.73%
7.07	438	3.35%
9.21	366	2.80%
7.15	304	2.33%
10.01	297	2.27%
8.00	265	2.03%
6.06	257	1.97%
8.04	191	1.46%
8.21	148	1.13%
8.10	136	1.04%
Other	1,188	9.10%
Lotus Domino (5,361 servers)
Version	Number of Servers	Percent
8.5.1	659	12.29%
8.5	477	8.90%
7.0.2	377	7.03%
8.5.1FP2	298	5.56%
8.0.2	245	4.57%
7.0.3	229	4.27%
8.0.1	211	3.94%
7.0.1	194	3.62%
6.5.4	176	3.28%
6.5.1	166	3.10%
7.0.3FP1	143	2.67%
6.5.3	139	2.59%
8.5.1FP1	130	2.42%
8.0	128	2.39%
6.5.5	127	2.37%
7.0.2FP2	126	2.35%
7.0	123	2.29%
8.5FP1	114	2.13%
8.5.1FP3	97	1.81%
6.5	93	1.73%
5.0.11	68	1.27%
Other	1,041	19.42%
Kerio (4,943 servers)
Version	Number of Servers	Percent
6.7.3	884	17.88%
6.7.2	557	11.27%
6.6.2	540	10.92%
6.7.0	530	10.72%
6.7.1	281	5.68%
6.5.0	281	5.68%
6.5.2	264	5.34%
6.4.1	208	4.21%
6.3.1	205	4.15%
6.5.1	148	2.99%
6.6.0	145	2.93%
6.4.0	142	2.87%
6.4.2	113	2.29%
6.6.1	108	2.18%
6.3.0	87	1.76%
Other	450	9.10%
WinWebMail (4,761 servers)
Version	Number of Servers	Percent
3.8.0.1	1,314	27.60%
3.7.6.1	818	17.18%
3.7.7.3	624	13.11%
3.7.3.1	591	12.41%
3.7.1.1	296	6.22%
3.8.1.1	227	4.77%
3.7.5.1	208	4.37%
3.7.7.1	157	3.30%
3.6.3.1	151	3.17%
3.7.0.5	140	2.94%
3.7.0.3	107	2.25%
3.7.0.7	95	2.00%
Other	33	0.69%
CommuniGate Pro (3,860 servers)
Version	Number of Servers	Percent
5.1.16	237	6.14%
4.1.8	220	5.70%
5.2.16	214	5.54%
5.3.7	206	5.34%
4.2.10	143	3.70%
5.3.5	130	3.37%
5.2.14	117	3.03%
5.2.19	100	2.59%
5.3.2	95	2.46%
5.2.3	95	2.46%
5.1.12	92	2.38%
5.2.12	91	2.36%
5.2.8	79	2.05%
5.0.14	78	2.02%
5.1.13	76	1.97%
5.2.13	74	1.92%
5.2.18	74	1.92%
5.2.10	67	1.74%
5.3.4	57	1.48%
5.2.17	55	1.42%
5.1.14	55	1.42%
5.2.11	52	1.35%
5.2.9	50	1.30%
5.0.9	50	1.30%
5.1.9	49	1.27%
5.2.20	48	1.24%
5.2.6	47	1.22%
5.2.0	45	1.17%
4.2.8	40	1.04%
4.2.9	40	1.04%
5.3.1	39	1.01%
Other	1,045	27.07%
Merak (2,768 servers)
Version	Number of Servers	Percent
8.0.3	1,178	42.56%
8.9.1	262	9.47%
8.5.0	164	5.92%
7.4.5	140	5.06%
7.5.2	126	4.55%
8.3.8	108	3.90%
7.6.4	107	3.87%
7.4.2	49	1.77%
8.2.13	45	1.63%
9.0.0	37	1.34%
7.6.1	36	1.30%
7.2.0	35	1.26%
8.2.4	31	1.12%
8.3.15	30	1.08%
7.0.1	29	1.05%
8.9.0	29	1.05%
Other	362	13.08%
XMail (2,611 servers)
Version	Number of Servers	Percent
1.25	667	25.55%
1.22	632	24.21%
1.26	352	13.48%
1.24	349	13.37%
1.21	142	5.44%
1.27	112	4.29%
1.23	69	2.64%
1.20	67	2.57%
1.17	62	2.37%
1.12	54	2.07%
Other	105	4.02%
Qmail Toaster (1,737 servers)
Version	Number of Servers	Percent
1.3	1,587	91.36%
1.2	111	6.39%
1.0	29	1.67%
Other	10	0.58%
ArGoSoft (1,487 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	264	17.75%
1.8 (1.8.9.5)	256	17.22%
1.8 (1.8.9.3)	193	12.98%
1.8 (1.8.9.1)	132	8.88%
1.8 (1.8.8.8)	117	7.87%
1.8 (1.8.8.7)	98	6.59%
1.8 (1.8.9.2)	60	4.03%
1.8 (1.8.9.4)	51	3.43%
1.8 (1.8.8.9)	33	2.22%
1.8 (1.8.8.1)	29	1.95%
1.8 (1.8.9.0)	27	1.82%
1.8 (1.8.6.0)	23	1.55%
Other	204	13.72%
SurgeSMTP (1,422 servers)
Version	Number of Servers	Percent
4.2d4-4	238	16.74%
4.3e-1	161	11.32%
3.9e-1	155	10.90%
4.3g-1	115	8.09%
4.2d2-2	91	6.40%
4.0u4-4	86	6.05%
3.8k4-4	85	5.98%
4.2a3-3	37	2.60%
3.8i3-3	34	2.39%
3.7b8-8	33	2.32%
3.8f3-3	30	2.11%
3.9c-1	26	1.83%
3.6f5-5	26	1.83%
4.3g2-2	21	1.48%
3.5b3-3	20	1.41%
3.8f2-2	17	1.20%
3.9g2-2	16	1.13%
Other	231	16.24%
GroupWise (1,395 servers)
Version	Number of Servers	Percent
7.0.3	406	29.10%
8.0.1	187	13.41%
6.5.7	168	12.04%
7.0.2	165	11.83%
7.0.1	83	5.95%
6.5.4	81	5.81%
6.5.6	54	3.87%
8.0.0	49	3.51%
6.0.4	43	3.08%
6.5.1	37	2.65%
6.5.5	20	1.43%
7.0	16	1.15%
7.0.4	15	1.08%
Other	71	5.09%
Trend Micro (996 servers)
Version	Number of Servers	Percent
5.7	448	44.98%
5.5	283	28.41%
5.18	156	15.66%
7.0	77	7.73%
7	14	1.41%
Other	18	1.81%
Gordano Messaging Suite (GMS) (590 servers)
Version	Number of Servers	Percent
Other	590	100.00%
Post.Office (581 servers)
Version	Number of Servers	Percent
3.5.3	99	17.04%
4.1.0.2	68	11.70%
4.0.1	49	8.43%
3.5.3J	41	7.06%
4.1.1	29	4.99%
3.8.3	25	4.30%
4.1.0.4	20	3.44%
3.9.2.3	18	3.10%
3.1.2J	17	2.93%
3.6.3	16	2.75%
3.9.1	15	2.58%
3.6.2	14	2.41%
3.9.2	12	2.07%
3.8.7.4	12	2.07%
3.1.2	11	1.89%
4.1	11	1.89%
3.9.0	10	1.72%
4.0.1.1	10	1.72%
4.0.0.2	10	1.72%
4.1.0.3	9	1.55%
4.0.0.1	8	1.38%
3.9.2.1	8	1.38%
3.5.2	8	1.38%
3.9.1.3	7	1.20%
3.9.1.2	6	1.03%
3.8.4	6	1.03%
Other	42	7.23%
MagicMail (454 servers)
Version	Number of Servers	Percent
Other	454	100.00%
Mirapoint (399 servers)
Version	Number of Servers	Percent
3.8.4-GA	47	11.78%
3.10.5-GA	35	8.77%
3.10.8-GA	35	8.77%
3.8.3-GA	32	8.02%
3.10.7-GA	30	7.52%
3.10.9-GA	27	6.77%
3.10.4-GA	21	5.26%
4.1.8-GA	18	4.51%
4.1.3-GA	17	4.26%
4.1.9-GA	14	3.51%
3.10.3-GA	13	3.26%
3.10.6-GA	13	3.26%
3.8.7a	11	2.76%
3.8.6-GA	9	2.26%
3.8.2-GA	9	2.26%
4.1.4-GA	9	2.26%
3.7.5a-GA	8	2.01%
3.8.5-GA	7	1.75%
4.1.5-GA	7	1.75%
3.10.2-GA	7	1.75%
4.0.5a	6	1.50%
3.7.3a-GA	4	1.00%
Other	20	5.01%
VisNetic (317 servers)
Version	Number of Servers	Percent
9.3.2.0	125	39.43%
9.1.4.1	41	12.93%
5.8.6.6	16	5.05%
8.5.0.8	13	4.10%
6.2.2.0	10	3.15%
5.5.8.3	10	3.15%
8.0.3.1	9	2.84%
8.0.3.0	8	2.52%
7.6.1.0	8	2.52%
8.3.5.0	7	2.21%
9.1.4.0	7	2.21%
8.0.3	7	2.21%
8.3.6	6	1.89%
5.0.2.3	6	1.89%
5.3.5.0	6	1.89%
7.2.4.1	6	1.89%
5.4.5.4	5	1.58%
7.2.4.0	4	1.26%
Other	23	7.26%
InterScan VirusWall (300 servers)
Version	Number of Servers	Percent
Other	300	100.00%
NetIQ MailMarshal (169 servers)
Version	Number of Servers	Percent
6.0.3.8	126	74.56%
5.5.6.7	13	7.69%
6.1.3.15	12	7.10%
5.5.6.6	4	2.37%
5.5.4.16	4	2.37%
5.5.6.5	3	1.78%
5.5.3.17	2	1.18%
Other	5	2.96%
Interscan (136 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	22	16.18%
3.81-Build_1022	19	13.97%
3.53 (build 2017)	17	12.50%
3.55 (build 1029)	15	11.03%
3.81-Build_1084	11	8.09%
3.8-Build_3013	8	5.88%
3.53 (build 2011)	8	5.88%
3.55 (build 1020)	7	5.15%
3.53 (build 1493)	6	4.41%
3.52 (build 1375)	4	2.94%
3.53 (build 2013)	3	2.21%
3.53 (build 1494)	2	1.47%
3.8-Build_1080	2	1.47%
Other	12	8.82%
Mercury (94 servers)
Version	Number of Servers	Percent
1.48	50	53.19%
3.32	23	24.47%
3.21c	8	8.51%
1.47	3	3.19%
3.01a	2	2.13%
1.49	2	2.13%
3.30	2	2.13%
3.21	1	1.06%
1.44	1	1.06%
4.52	1	1.06%
3.31	1	1.06%
Other	0	0.00%
WebSTAR V (82 servers)
Version	Number of Servers	Percent
5.4.1	26	31.71%
5.4.0	23	28.05%
5.3.4	18	21.95%
5.3.2	7	8.54%
5.3.3	4	4.88%
5.2.3	2	2.44%
5.3.0	1	1.22%
5.3.1	1	1.22%
Other	0	0.00%
Neon Mail Server (77 servers)
Version	Number of Servers	Percent
3.1.3	17	22.08%
3.0.7	17	22.08%
3.0.9	11	14.29%
3.1.4	10	12.99%
3.1.2	7	9.09%
3.1.0	6	7.79%
3.1.5	5	6.49%
3.1.1	3	3.90%
3.0.6	1	1.30%
Other	0	0.00%
ModusMail (33 servers)
Version	Number of Servers	Percent
4.35.477.0	9	27.27%
4.35.480.0	5	15.15%
4.2.420.0	5	15.15%
4.1.361.21	2	6.06%
3.2.315.0	2	6.06%
3.1.293.1	2	6.06%
3.1.302.0	2	6.06%
4.35.480.11	2	6.06%
4.2.425.22	1	3.03%
4.0.340.3	1	3.03%
4.3.459.0	1	3.03%
4.35.477.8	1	3.03%
Other	0	0.00%
MessageWall (32 servers)
Version	Number of Servers	Percent
1.0.8	29	90.62%
1.0.11	1	3.12%
1.0.6	1	3.12%
1.1.0	1	3.12%
Other	0	0.00%
WebSTAR (29 servers)
Version	Number of Servers	Percent
Other	29	100.00%
MAILsweeper (24 servers)
Version	Number of Servers	Percent
4.3.20.0	7	29.17%
4.3.17.0	4	16.67%
4.3.14.0	4	16.67%
4.3.6.0	4	16.67%
4.3.1.0	2	8.33%
4.3.19.0	1	4.17%
4.3.10.0	1	4.17%
4.2.5.0	1	4.17%
Other	0	0.00%
OpenVMS (23 servers)
Version	Number of Servers	Percent
8.3	13	56.52%
7.3	6	26.09%
8.2	2	8.70%
6.1	1	4.35%
7.2	1	4.35%
Other	0	0.00%
OpenSMTPD (6 servers)
Version	Number of Servers	Percent
Other	6	100.00%