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	2,027,278	100.0%
Number of Servers that didn't respond	365,894	18.05%
Server didn't open socket	358,620	17.69%
Server didn't provide banner	7,274	0.36%
Server provided banner	1,661,384	81.95%
Server banner identifies software in use	1,015,863	50.11%

As indicated by the above table, of the 2,027,278 servers queried, only 1,015,863 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	571,648	56.27%
Postfix	339,852	33.45%
Sendmail	48,459	4.77%
MailEnable	23,217	2.29%
MDaemon	11,997	1.18%
Microsoft	10,071	0.99%
IMail	2,129	0.21%
CommuniGate Pro	1,793	0.18%
XMail	1,062	0.10%
WinWebMail	1,058	0.10%
Lotus Domino	1,020	0.10%
Qmail Toaster	827	0.08%
SurgeSMTP	671	0.07%
Kerio	451	0.04%
OpenSMTPD	317	0.03%
Merak	296	0.03%
MagicMail	233	0.02%
ArGoSoft	187	0.02%
Post.Office	163	0.02%
Gordano Messaging Suite (GMS)	110	0.01%
GroupWise	105	0.01%
Trend Micro	68	0.01%
VisNetic	28	0.00%
InterScan VirusWall	27	0.00%
Mirapoint	20	0.00%
OpenVMS	16	0.00%
Mercury	8	0.00%
Interscan	7	0.00%
ModusMail	7	0.00%
WebSTAR V	6	0.00%
MessageWall	5	0.00%
Neon Mail Server	4	0.00%
WebSTAR	1	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (571,648 servers)
Version	Number of Servers	Percent
4.89	279,403	48.88%
4.87	178,737	31.27%
4.88	25,128	4.40%
4.84	19,156	3.35%
4.80	11,113	1.94%
4.86	10,159	1.78%
4.85	7,891	1.38%
4.72	7,808	1.37%
4.82	7,130	1.25%
4.76	7,108	1.24%
Other	18,015	3.15%
Postfix (339,852 servers)
Version	Number of Servers	Percent
Other	339,852	100.00%
Sendmail (48,459 servers)
Version	Number of Servers	Percent
8.14.5	11,850	24.45%
8.14.4	11,609	23.96%
8.13.8	8,064	16.64%
8.13.1	4,926	10.17%
8.15.2	2,480	5.12%
8.14.3	2,363	4.88%
8.14.7	1,589	3.28%
8.14.9	1,393	2.87%
8.14.2	487	1.00%
Other	3,698	7.63%
MailEnable (23,217 servers)
Version	Number of Servers	Percent
9.00--	3,233	13.93%
8.60--	1,275	5.49%
8.53--	1,088	4.69%
6.5--	929	4.00%
9.16--	880	3.79%
8.51--	733	3.16%
1.986--	654	2.82%
8.04--	538	2.32%
8.60-8.60-	449	1.93%
5.10--	372	1.60%
8.50--	358	1.54%
9.53--	350	1.51%
8.00--	331	1.43%
9.74--	300	1.29%
7.06--	257	1.11%
6.0--	255	1.10%
4.26--	245	1.06%
Other	10,970	47.25%
MDaemon (11,997 servers)
Version	Number of Servers	Percent
16.5.2	1,193	9.94%
17.0.2	924	7.70%
13.5.1	567	4.73%
16.0.4	504	4.20%
11.0.0	500	4.17%
11.0.3	484	4.03%
13.0.4	471	3.93%
13.0.5	444	3.70%
13.6.3	425	3.54%
17.0.0	406	3.38%
16.5.1	356	2.97%
12.5.6	261	2.18%
15.0.3	253	2.11%
12.5.4	241	2.01%
14.5.2	203	1.69%
10.0.0	191	1.59%
10.1.2	179	1.49%
15.5.3	179	1.49%
16.0.1	158	1.32%
16.5.0	130	1.08%
10.1.1	128	1.07%
Other	3,800	31.67%
Microsoft (10,071 servers)
Version	Number of Servers	Percent
6.0.3790.4675	6,151	61.08%
7.5.7601.17514	1,149	11.41%
8.5.9600.16384	774	7.69%
6.0.3790.3959	747	7.42%
8.0.9200.16384	191	1.90%
6.0.3790.1830	178	1.77%
5.0.2195.5329	173	1.72%
7.0.6002.18264	165	1.64%
5.0.2195.7381	108	1.07%
Other	435	4.32%
IMail (2,129 servers)
Version	Number of Servers	Percent
12.5.5.115	423	19.87%
12.4.1.15	181	8.50%
8.22	162	7.61%
12.5.3.93	159	7.47%
12.5.4.146	139	6.53%
9.23	134	6.29%
8.15	106	4.98%
12.3.0.100	98	4.60%
8.05	67	3.15%
11.03	62	2.91%
11.5	54	2.54%
12.5.1.60	32	1.50%
7.07	31	1.46%
10.02	29	1.36%
7.15	29	1.36%
11.02	26	1.22%
12.5.5.117	25	1.17%
10.01	23	1.08%
Other	349	16.39%
CommuniGate Pro (1,793 servers)
Version	Number of Servers	Percent
5.1.16	165	9.20%
6.1.16	159	8.87%
6.1.11	77	4.29%
6.1.10	67	3.74%
5.4.11	65	3.63%
6.0.11	61	3.40%
5.2.20	59	3.29%
6.1.15	53	2.96%
6.1.13	49	2.73%
6.0.9	48	2.68%
6.1.14	48	2.68%
6.1.2	44	2.45%
5.3.13	38	2.12%
6.1.12	38	2.12%
5.0.14	34	1.90%
5.2.3	33	1.84%
6.1.8	30	1.67%
6.2	29	1.62%
6.1.5	27	1.51%
4.1.8	27	1.51%
5.4.4	23	1.28%
6.0.10	21	1.17%
5.3.15	19	1.06%
6.0.5	18	1.00%
6.1.7	18	1.00%
Other	543	30.28%
XMail (1,062 servers)
Version	Number of Servers	Percent
1.27	454	42.75%
1.22	336	31.64%
1.25	85	8.00%
1.26	70	6.59%
1.24	43	4.05%
1.21	23	2.17%
1.23	14	1.32%
Other	37	3.48%
WinWebMail (1,058 servers)
Version	Number of Servers	Percent
3.9.0.7	250	23.63%
3.8.1.3	165	15.60%
3.9.0.1	77	7.28%
3.7.6.1	72	6.81%
3.8.0.1	66	6.24%
3.8.1.5	46	4.35%
3.9.2.1	44	4.16%
3.8.5.1	40	3.78%
3.8.1.1	38	3.59%
3.8.6.1	36	3.40%
3.7.3.1	34	3.21%
3.7.7.3	32	3.02%
3.8.2.1	22	2.08%
3.7.1.1	22	2.08%
3.8.3.1	14	1.32%
3.7.5.1	14	1.32%
3.9.1.1	11	1.04%
3.8.3.3	11	1.04%
3.7.0.5	11	1.04%
Other	53	5.01%
Lotus Domino (1,020 servers)
Version	Number of Servers	Percent
8.5.3FP6	193	18.92%
8.5.3	136	13.33%
8.5.2	46	4.51%
8.5	37	3.63%
7.0.2	37	3.63%
8.5.1	35	3.43%
8.5.3FP2	30	2.94%
8.5.3FP4	28	2.75%
8.5.2FP4	25	2.45%
7.0.3	25	2.45%
8.5.3FP1	25	2.45%
8.5.3FP3	24	2.35%
8.5.2FP3	22	2.16%
8.0.1	22	2.16%
8.5.3FP5	19	1.86%
8.0	19	1.86%
8.5.2FP2	16	1.57%
7.0	15	1.47%
7.0.4	14	1.37%
6.5.1	14	1.37%
8.5.1FP5	14	1.37%
6.5.4	13	1.27%
7.0.1	13	1.27%
7.0.3FP1	11	1.08%
Other	187	18.33%
Qmail Toaster (827 servers)
Version	Number of Servers	Percent
1.3	718	86.82%
1.03	64	7.74%
1.2	14	1.69%
1.03.5	12	1.45%
1.03.6	9	1.09%
Other	10	1.21%
SurgeSMTP (671 servers)
Version	Number of Servers	Percent
7.2i-1	137	20.42%
7.1e-1	101	15.05%
7.2a-1	41	6.11%
6.5a2-2	41	6.11%
7.2e-2	41	6.11%
6.9c-1	33	4.92%
6.7c-1	27	4.02%
6.5a-1	24	3.58%
7.0c2-2	20	2.98%
3.9e-1	18	2.68%
5.2a-1	15	2.24%
7.3b-3	11	1.64%
6.1c-1	10	1.49%
4.0u4-4	10	1.49%
6.4a-1	9	1.34%
5.3h2-2	8	1.19%
3.8k4-4	8	1.19%
6.3c2-2	8	1.19%
Other	109	16.24%
Kerio (451 servers)
Version	Number of Servers	Percent
6.7.3	98	21.73%
6.7.0	50	11.09%
6.5.2	46	10.20%
6.6.2	43	9.53%
6.7.2	30	6.65%
6.5.0	28	6.21%
6.6.1	19	4.21%
6.7.1	18	3.99%
6.4.1	17	3.77%
6.3.1	16	3.55%
6.5.1	13	2.88%
6.3.0	12	2.66%
6.4.0	9	2.00%
6.1.3	7	1.55%
6.6.0	7	1.55%
6.4.2	6	1.33%
6.2.0	5	1.11%
Other	27	5.99%
OpenSMTPD (317 servers)
Version	Number of Servers	Percent
Other	317	100.00%
Merak (296 servers)
Version	Number of Servers	Percent
8.0.3	86	29.05%
8.9.1	50	16.89%
8.5.0	21	7.09%
7.4.5	19	6.42%
7.5.2	16	5.41%
8.3.8	15	5.07%
7.6.4	14	4.73%
7.6.1	12	4.05%
7.4.2	7	2.36%
7.0.1	5	1.69%
6.1.0	4	1.35%
9.0.3	4	1.35%
7.2.0	4	1.35%
5.9.4	3	1.01%
4.2.1	3	1.01%
7.6.0	3	1.01%
8.9.0	3	1.01%
6.0.8	3	1.01%
Other	24	8.11%
MagicMail (233 servers)
Version	Number of Servers	Percent
Other	233	100.00%
ArGoSoft (187 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	65	34.76%
1.8 (1.8.9.5)	23	12.30%
1.8 (1.8.9.3)	20	10.70%
1.8 (1.8.9.1)	20	10.70%
1.8 (1.8.8.7)	7	3.74%
1.8 (1.8.7.3)	6	3.21%
1.8 (1.8.8.8)	5	2.67%
1.8 (1.8.6.0)	5	2.67%
1.8 (1.8.9.2)	4	2.14%
1.8 (1.8.8.9)	4	2.14%
1.8 (1.8.9.4)	3	1.60%
1.8 (1.8.7.6)	2	1.07%
1.8 (1.8.8.4)	2	1.07%
1.8 (1.8.5.8)	2	1.07%
1.8 (1.8.2.1)	2	1.07%
1.8 (1.8.6.1a	2	1.07%
1.8 (1.8.5.9)	2	1.07%
Other	13	6.95%
Post.Office (163 servers)
Version	Number of Servers	Percent
4.2.2	34	20.86%
4.3	31	19.02%
4.1.2.4	20	12.27%
3.5.3	16	9.82%
4.2.1.3	9	5.52%
3.9.2.3	6	3.68%
4.1.1	4	2.45%
4.2.1.1	4	2.45%
3.1.2	4	2.45%
3.9.2	3	1.84%
4.0.1	3	1.84%
4.2	3	1.84%
3.5.1	3	1.84%
3.5.4	2	1.23%
4.1.0.3	2	1.23%
4.1.2.3	2	1.23%
3.8.7.4	2	1.23%
3.9.1.3	2	1.23%
3.5.3J	2	1.23%
Other	11	6.75%
Gordano Messaging Suite (GMS) (110 servers)
Version	Number of Servers	Percent
Other	110	100.00%
GroupWise (105 servers)
Version	Number of Servers	Percent
14.2.1	22	20.95%
14.2.0	12	11.43%
14.2.2	12	11.43%
6.5.7	9	8.57%
7.0.3	7	6.67%
14.0.1	6	5.71%
14.0.2	5	4.76%
14.0.0	5	4.76%
7.0.2	3	2.86%
8.0.3	3	2.86%
12.0.4	2	1.90%
12.0.1	2	1.90%
8.0.2	2	1.90%
6.0.4	2	1.90%
7.0.4	2	1.90%
6.0.2	2	1.90%
Other	9	8.57%
Trend Micro (68 servers)
Version	Number of Servers	Percent
5.7	21	30.88%
5.18	13	19.12%
5.5	13	19.12%
7.0	8	11.76%
7.5	5	7.35%
7.1	2	2.94%
3.53	2	2.94%
8.5	1	1.47%
7.5ready	1	1.47%
9.0	1	1.47%
8	1	1.47%
Other	0	0.00%
VisNetic (28 servers)
Version	Number of Servers	Percent
9.3.2.0	8	28.57%
6.2.2.0	3	10.71%
5.8.6.6	3	10.71%
5.0.2.3	2	7.14%
5.5.8.3	2	7.14%
8.0.3	1	3.57%
9.1.4.0	1	3.57%
8.5.0.5	1	3.57%
7.6.1.0	1	3.57%
9.1.4.1	1	3.57%
8.0.3.1	1	3.57%
5.3.5.0	1	3.57%
5.0.2.0	1	3.57%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	3.57%
8.5.0.8	1	3.57%
Other	0	0.00%
InterScan VirusWall (27 servers)
Version	Number of Servers	Percent
Other	27	100.00%
Mirapoint (20 servers)
Version	Number of Servers	Percent
4.4.3-GA	4	20.00%
4.4.2a-FCS	3	15.00%
4.3.5-GA	3	15.00%
4.4.7-GA	2	10.00%
4.1.9-GA	1	5.00%
4.4.4-GA	1	5.00%
4.3.6-GA	1	5.00%
3.10.10a-GA	1	5.00%
4.4.3a-GA	1	5.00%
3.7.5a-GA	1	5.00%
4.4.5-GA	1	5.00%
4.4.6-GA	1	5.00%
Other	0	0.00%
OpenVMS (16 servers)
Version	Number of Servers	Percent
8.4	7	43.75%
7.3	5	31.25%
8.3	3	18.75%
8.2	1	6.25%
Other	0	0.00%
Mercury (8 servers)
Version	Number of Servers	Percent
3.32	3	37.50%
1.48	3	37.50%
3.21	1	12.50%
4.x	1	12.50%
Other	0	0.00%
Interscan (7 servers)
Version	Number of Servers	Percent
3.5 (build 1294)	2	28.57%
3.81-Build_1022	2	28.57%
3.81-Build_1084	1	14.29%
3.8-Build_3013	1	14.29%
3.8-Build_1080	1	14.29%
Other	0	0.00%
ModusMail (7 servers)
Version	Number of Servers	Percent
4.35.477.0	5	71.43%
4.1.361.21	1	14.29%
4.35.477.8	1	14.29%
Other	0	0.00%
WebSTAR V (6 servers)
Version	Number of Servers	Percent
5.4.1	4	66.67%
5.3.2	1	16.67%
5.3.4	1	16.67%
Other	0	0.00%
MessageWall (5 servers)
Version	Number of Servers	Percent
1.0.8	5	100.00%
Other	0	0.00%
Neon Mail Server (4 servers)
Version	Number of Servers	Percent
3.1.0	2	50.00%
3.1.3	1	25.00%
3.0.7	1	25.00%
Other	0	0.00%
WebSTAR (1 servers)
Version	Number of Servers	Percent
Other	1	100.00%