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	2,477,074	100.0%
Number of Servers that didn't respond	435,771	17.59%
Server didn't open socket	424,026	17.12%
Server didn't provide banner	11,745	0.47%
Server provided banner	2,041,303	82.41%
Server banner identifies software in use	1,119,361	45.19%

As indicated by the above table, of the 2,477,074 servers queried, only 1,119,361 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	541,735	48.40%
Postfix	297,676	26.59%
Sendmail	114,637	10.24%
Microsoft	83,416	7.45%
MailEnable	33,182	2.96%
MDaemon	20,865	1.86%
IMail	6,865	0.61%
Lotus Domino	4,436	0.40%
WinWebMail	3,176	0.28%
CommuniGate Pro	3,094	0.28%
XMail	2,114	0.19%
Qmail Toaster	1,609	0.14%
Kerio	1,427	0.13%
Merak	1,141	0.10%
SurgeSMTP	1,011	0.09%
ArGoSoft	654	0.06%
GroupWise	428	0.04%
Post.Office	358	0.03%
MagicMail	320	0.03%
Gordano Messaging Suite (GMS)	309	0.03%
Trend Micro	292	0.03%
Mirapoint	123	0.01%
VisNetic	121	0.01%
InterScan VirusWall	118	0.01%
Mercury	47	0.00%
Interscan	40	0.00%
OpenSMTPD	29	0.00%
NetIQ MailMarshal	25	0.00%
WebSTAR V	25	0.00%
Neon Mail Server	22	0.00%
MessageWall	19	0.00%
OpenVMS	17	0.00%
WebSTAR	13	0.00%
ModusMail	12	0.00%
MAILsweeper	5	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (541,735 servers)
Version	Number of Servers	Percent
4.80	414,632	76.54%
4.80.1	28,858	5.33%
4.72	23,008	4.25%
4.69	20,727	3.83%
4.77	16,285	3.01%
4.76	15,154	2.80%
Other	23,071	4.26%
Postfix (297,676 servers)
Version	Number of Servers	Percent
Other	297,676	100.00%
Sendmail (114,637 servers)
Version	Number of Servers	Percent
8.13.8	30,217	26.36%
8.13.1	16,473	14.37%
8.14.3	15,539	13.55%
8.14.5	13,476	11.76%
8.14.4	12,895	11.25%
8.12.11.20060308	4,320	3.77%
8.13.6.20060614	3,297	2.88%
8.14.2	2,984	2.60%
8.11.6	1,984	1.73%
8.12.10	1,730	1.51%
8.14.1	1,637	1.43%
8.13.6	1,400	1.22%
8.13.7	1,271	1.11%
Other	7,414	6.47%
Microsoft (83,416 servers)
Version	Number of Servers	Percent
6.0.3790.4675	67,474	80.89%
6.0.3790.3959	8,354	10.01%
6.0.3790.1830	2,280	2.73%
7.5.7601.17514	2,004	2.40%
5.0.2195.7381	843	1.01%
Other	2,461	2.95%
MailEnable (33,182 servers)
Version	Number of Servers	Percent
1.986--	5,640	17.00%
5.10--	2,375	7.16%
6.5--	2,046	6.17%
4.26--	1,862	5.61%
6.0--	1,369	4.13%
1.981--	1,006	3.03%
1.983--	593	1.79%
3.62--	564	1.70%
6.70--	535	1.61%
5.51--	524	1.58%
6.57--	514	1.55%
6.03--	509	1.53%
0-6.83-	504	1.52%
7.06--	451	1.36%
6.60--	437	1.32%
7.06--7.06	395	1.19%
5.11--	371	1.12%
0-3.65-	365	1.10%
7.0--	359	1.08%
0-3.63-	353	1.06%
0-7.06-	338	1.02%
0-1.87-	337	1.02%
Other	11,735	35.37%
MDaemon (20,865 servers)
Version	Number of Servers	Percent
13.0.5	2,449	11.74%
13.0.4	2,121	10.17%
11.0.3	1,690	8.10%
13.0.3	1,403	6.72%
11.0.0	1,235	5.92%
10.0.0	751	3.60%
12.5.6	719	3.45%
13.0.2	654	3.13%
10.1.2	624	2.99%
10.1.1	583	2.79%
9.6.1	461	2.21%
9.6.6	414	1.98%
10.1.0	391	1.87%
12.5.4	390	1.87%
12.5.8	290	1.39%
9.6.2	284	1.36%
9.5.2	281	1.35%
12.0.3	274	1.31%
12.5.3	249	1.19%
9.6.5	242	1.16%
10.0.5	236	1.13%
10.0.2	221	1.06%
9.5.1	220	1.05%
13.0.0	218	1.04%
9.5.6	215	1.03%
Other	4,250	20.37%
IMail (6,865 servers)
Version	Number of Servers	Percent
8.22	1,134	16.52%
12.2.0.235	934	13.61%
11.5	601	8.75%
8.15	406	5.91%
9.23	404	5.88%
11.03	363	5.29%
8.05	257	3.74%
12.2.0.169	250	3.64%
12.1.0.270	248	3.61%
11.01	233	3.39%
10.02	224	3.26%
7.07	149	2.17%
12.3.0.100	143	2.08%
6.06	125	1.82%
7.15	124	1.81%
8.00	119	1.73%
11.0	100	1.46%
10.01	99	1.44%
11.02	97	1.41%
Other	855	12.45%
Lotus Domino (4,436 servers)
Version	Number of Servers	Percent
8.5.3	766	17.27%
8.5.3FP3	357	8.05%
8.5.3FP2	258	5.82%
8.5.2	250	5.64%
8.5.3FP1	203	4.58%
8.5.2FP2	196	4.42%
8.5.1	181	4.08%
7.0.2	164	3.70%
8.5	145	3.27%
8.5.2FP3	128	2.89%
8.5.2FP4	100	2.25%
7.0.3	99	2.23%
8.5.1FP5	80	1.80%
8.5.2FP1	78	1.76%
8.0.1	75	1.69%
8.0.2	75	1.69%
7.0.1	74	1.67%
7.0	70	1.58%
6.5.4	69	1.56%
6.5.3	66	1.49%
6.5.1	63	1.42%
8.0	57	1.28%
8.5.3FP4	57	1.28%
6.5.5	52	1.17%
6.5	47	1.06%
Other	726	16.37%
WinWebMail (3,176 servers)
Version	Number of Servers	Percent
3.8.1.3	615	19.36%
3.8.0.1	386	12.15%
3.7.6.1	313	9.86%
3.8.1.5	274	8.63%
3.8.1.1	219	6.90%
3.7.3.1	216	6.80%
3.7.7.3	197	6.20%
3.8.2.1	196	6.17%
3.8.5.1	151	4.75%
3.7.1.1	104	3.27%
3.8.3.1	103	3.24%
3.8.3.3	86	2.71%
3.7.5.1	83	2.61%
3.6.3.1	46	1.45%
3.7.7.1	44	1.39%
3.7.0.5	41	1.29%
3.7.0.3	41	1.29%
3.7.0.7	34	1.07%
Other	27	0.85%
CommuniGate Pro (3,094 servers)
Version	Number of Servers	Percent
5.1.16	286	9.24%
6.0.4	142	4.59%
4.1.8	111	3.59%
5.2.20	108	3.49%
6.0.1	105	3.39%
5.4.8	100	3.23%
5.4.6	87	2.81%
5.4.4	86	2.78%
5.3.13	82	2.65%
4.2.10	71	2.29%
5.3.15	69	2.23%
5.4.1	66	2.13%
5.0.14	59	1.91%
5.4.5	59	1.91%
5.1.12	58	1.87%
5.2.19	56	1.81%
5.4.7	56	1.81%
5.2.16	54	1.75%
5.2.3	53	1.71%
5.4.10	53	1.71%
5.4.2	48	1.55%
5.4.9	47	1.52%
5.4.3	46	1.49%
5.2.14	37	1.20%
5.4.0	36	1.16%
6.0.2	33	1.07%
5.2.10	31	1.00%
5.2.12	31	1.00%
Other	1,024	33.10%
XMail (2,114 servers)
Version	Number of Servers	Percent
1.27	636	30.09%
1.22	513	24.27%
1.25	337	15.94%
1.26	221	10.45%
1.24	145	6.86%
1.21	73	3.45%
1.23	41	1.94%
1.20	34	1.61%
1.17	31	1.47%
Other	83	3.93%
Qmail Toaster (1,609 servers)
Version	Number of Servers	Percent
1.3	1,520	94.47%
1.2	47	2.92%
Other	42	2.61%
Kerio (1,427 servers)
Version	Number of Servers	Percent
6.7.3	236	16.54%
6.6.2	145	10.16%
6.7.0	136	9.53%
6.5.0	113	7.92%
6.5.2	95	6.66%
6.7.2	85	5.96%
6.4.1	80	5.61%
6.7.1	80	5.61%
6.3.1	61	4.27%
6.4.0	51	3.57%
6.6.1	50	3.50%
6.6.0	45	3.15%
6.5.1	42	2.94%
6.4.2	31	2.17%
6.3.0	27	1.89%
6.0.10	19	1.33%
6.2.0	15	1.05%
Other	116	8.13%
Merak (1,141 servers)
Version	Number of Servers	Percent
8.0.3	447	39.18%
8.9.1	130	11.39%
8.5.0	69	6.05%
8.3.8	56	4.91%
7.5.2	53	4.65%
7.4.5	47	4.12%
7.6.4	45	3.94%
7.0.1	23	2.02%
9.0.0	20	1.75%
7.6.1	18	1.58%
7.4.2	17	1.49%
7.2.0	16	1.40%
8.9.0	14	1.23%
6.2.1	14	1.23%
7.6.0	13	1.14%
4.4.2	13	1.14%
8.3.15	13	1.14%
8.2.4	12	1.05%
Other	121	10.60%
SurgeSMTP (1,011 servers)
Version	Number of Servers	Percent
6.3c2-2	305	30.17%
5.2a-1	86	8.51%
6.1c-1	84	8.31%
5.3h2-2	78	7.72%
3.9e-1	45	4.45%
6.0a5-5	30	2.97%
3.8k4-4	25	2.47%
4.0u4-4	22	2.18%
6.0a4-4	21	2.08%
4.2d2-2	19	1.88%
4.3g2-2	18	1.78%
5.0e4-4	15	1.48%
3.8i3-3	14	1.38%
6.3d-72	12	1.19%
Other	237	23.44%
ArGoSoft (654 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	168	25.69%
1.8 (1.8.9.5)	93	14.22%
1.8 (1.8.9.3)	82	12.54%
1.8 (1.8.9.1)	73	11.16%
1.8 (1.8.8.7)	42	6.42%
1.8 (1.8.8.8)	39	5.96%
1.8 (1.8.9.2)	22	3.36%
1.8 (1.8.9.4)	18	2.75%
1.8 (1.8.8.9)	14	2.14%
1.8 (1.8.6.0)	10	1.53%
1.8 (1.8.7.3)	7	1.07%
Other	86	13.15%
GroupWise (428 servers)
Version	Number of Servers	Percent
7.0.3	83	19.39%
8.0.2	65	15.19%
6.5.7	45	10.51%
7.0.4	36	8.41%
7.0.2	27	6.31%
8.0.3	22	5.14%
6.5.6	20	4.67%
6.5.4	18	4.21%
6.0.4	15	3.50%
8.0.1	14	3.27%
7.0.1	12	2.80%
6.5.1	10	2.34%
12.0.1	10	2.34%
12.0.0	8	1.87%
8.0.0	8	1.87%
7.0	6	1.40%
12.0.2	6	1.40%
6.5.5	5	1.17%
Other	18	4.21%
Post.Office (358 servers)
Version	Number of Servers	Percent
3.5.3	44	12.29%
4.1.2.4	33	9.22%
4.1.0.2	32	8.94%
4.0.1	22	6.15%
4.1.1	19	5.31%
3.5.3J	13	3.63%
3.9.2.3	13	3.63%
4.2	11	3.07%
4.1.0.3	10	2.79%
3.9.2	10	2.79%
3.8.3	10	2.79%
3.1.2J	9	2.51%
3.1.2	8	2.23%
4.1.0.4	8	2.23%
3.6.2	7	1.96%
4.2.2	7	1.96%
4.0.1.1	6	1.68%
4.1.2.3	6	1.68%
4.1.2.2	6	1.68%
3.9.1	6	1.68%
4.2.1.1	6	1.68%
4.2.1.3	5	1.40%
3.8.7.4	5	1.40%
3.5.1	5	1.40%
3.9.2.2	4	1.12%
3.5.4	4	1.12%
3.9.1.2	4	1.12%
4.1	4	1.12%
3.9.1.3	4	1.12%
4.0.0.1	4	1.12%
Other	33	9.22%
MagicMail (320 servers)
Version	Number of Servers	Percent
Other	320	100.00%
Gordano Messaging Suite (GMS) (309 servers)
Version	Number of Servers	Percent
Other	309	100.00%
Trend Micro (292 servers)
Version	Number of Servers	Percent
5.7	115	39.38%
5.5	65	22.26%
5.18	50	17.12%
7.0	29	9.93%
7.1	21	7.19%
3.53	3	1.03%
Other	9	3.08%
Mirapoint (123 servers)
Version	Number of Servers	Percent
4.3.5-GA	18	14.63%
3.10.10a-GA	12	9.76%
4.2.3-GA	10	8.13%
4.1.10-GA	8	6.50%
3.10.9-GA	7	5.69%
4.1.9-GA	6	4.88%
4.3.6-GA	6	4.88%
4.1.4-GA	5	4.07%
3.10.8-GA	4	3.25%
4.2.4-GA	4	3.25%
4.1.8-GA	4	3.25%
4.1.3-GA	3	2.44%
4.4.2a-FCS	3	2.44%
3.10.4-GA	3	2.44%
3.7.5a-GA	3	2.44%
3.8.4-GA	3	2.44%
3.8.3-GA	3	2.44%
3.8.5-GA	3	2.44%
4.1.5-GA	3	2.44%
3.10.3-GA	2	1.63%
3.10.2-GA	2	1.63%
4.3.3-GA	2	1.63%
4.0.5a	2	1.63%
Other	7	5.69%
VisNetic (121 servers)
Version	Number of Servers	Percent
9.3.2.0	31	25.62%
9.1.4.1	15	12.40%
8.0.3.1	7	5.79%
7.6.1.0	7	5.79%
5.5.8.3	6	4.96%
5.8.6.6	5	4.13%
6.2.2.0	5	4.13%
8.0.3.0	5	4.13%
8.5.0.8	5	4.13%
7.2.4.1	4	3.31%
8.0.3	4	3.31%
5.0.2.3	4	3.31%
9.1.4.0	3	2.48%
5.4.5.4	3	2.48%
5.8.6.4	2	1.65%
5.3.5.0	2	1.65%
Other	13	10.74%
InterScan VirusWall (118 servers)
Version	Number of Servers	Percent
Other	118	100.00%
Mercury (47 servers)
Version	Number of Servers	Percent
1.48	28	59.57%
3.32	11	23.40%
1.47	2	4.26%
3.21c	2	4.26%
3.21	1	2.13%
1.44	1	2.13%
4.x	1	2.13%
3.30	1	2.13%
Other	0	0.00%
Interscan (40 servers)
Version	Number of Servers	Percent
3.55 (build 1016)	8	20.00%
3.81-Build_1022	8	20.00%
3.55 (build 1029)	5	12.50%
3.53 (build 2011)	4	10.00%
3.81-Build_1084	3	7.50%
3.53 (build 1493)	3	7.50%
3.8-Build_3013	2	5.00%
3.53 (build 2017)	2	5.00%
3.5 (build 1294)	1	2.50%
3.51 (build 1337)	1	2.50%
3.53 (build 2013)	1	2.50%
3.8-Build_3045	1	2.50%
3.8-Build_1080	1	2.50%
Other	0	0.00%
OpenSMTPD (29 servers)
Version	Number of Servers	Percent
Other	29	100.00%
NetIQ MailMarshal (25 servers)
Version	Number of Servers	Percent
6.0.3.8	16	64.00%
5.5.6.7	3	12.00%
5.5.6.5	2	8.00%
5.5.6.6	2	8.00%
5.5.5.6	1	4.00%
5.5.4.17	1	4.00%
Other	0	0.00%
WebSTAR V (25 servers)
Version	Number of Servers	Percent
5.4.1	14	56.00%
5.4.0	5	20.00%
5.3.4	3	12.00%
5.3.2	2	8.00%
5.3.3	1	4.00%
Other	0	0.00%
Neon Mail Server (22 servers)
Version	Number of Servers	Percent
3.0.7	7	31.82%
3.1.4	3	13.64%
3.1.2	3	13.64%
3.1.3	3	13.64%
3.0.9	2	9.09%
3.1.0	2	9.09%
3.1.5	1	4.55%
3.0.6	1	4.55%
Other	0	0.00%
MessageWall (19 servers)
Version	Number of Servers	Percent
1.0.8	18	94.74%
1.0.6	1	5.26%
Other	0	0.00%
OpenVMS (17 servers)
Version	Number of Servers	Percent
8.3	8	47.06%
8.4	4	23.53%
7.3	4	23.53%
8.2	1	5.88%
Other	0	0.00%
WebSTAR (13 servers)
Version	Number of Servers	Percent
Other	13	100.00%
ModusMail (12 servers)
Version	Number of Servers	Percent
4.35.477.0	6	50.00%
4.1.361.21	1	8.33%
3.2.315.0	1	8.33%
4.0.340.3	1	8.33%
4.35.480.0	1	8.33%
4.35.477.8	1	8.33%
3.1.302.0	1	8.33%
Other	0	0.00%
MAILsweeper (5 servers)
Version	Number of Servers	Percent
4.3.17.0	2	40.00%
4.3.19.0	2	40.00%
4.3.20.0	1	20.00%
Other	0	0.00%