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	2,453,178	100.0%
Number of Servers that didn't respond	432,971	17.65%
Server didn't open socket	422,936	17.24%
Server didn't provide banner	10,035	0.41%
Server provided banner	2,020,207	82.35%
Server banner identifies software in use	1,133,855	46.22%

As indicated by the above table, of the 2,453,178 servers queried, only 1,133,855 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	575,565	50.76%
Postfix	321,901	28.39%
Sendmail	102,630	9.05%
Microsoft	59,046	5.21%
MailEnable	31,873	2.81%
MDaemon	19,581	1.73%
IMail	5,635	0.50%
Lotus Domino	3,445	0.30%
CommuniGate Pro	2,879	0.25%
WinWebMail	2,547	0.22%
XMail	1,875	0.17%
Qmail Toaster	1,431	0.13%
Kerio	1,179	0.10%
SurgeSMTP	981	0.09%
Merak	896	0.08%
ArGoSoft	515	0.05%
Post.Office	297	0.03%
GroupWise	295	0.03%
MagicMail	294	0.03%
Gordano Messaging Suite (GMS)	266	0.02%
Trend Micro	230	0.02%
InterScan VirusWall	98	0.01%
Mirapoint	83	0.01%
OpenSMTPD	78	0.01%
VisNetic	70	0.01%
Mercury	32	0.00%
Interscan	25	0.00%
WebSTAR V	24	0.00%
OpenVMS	23	0.00%
NetIQ MailMarshal	18	0.00%
Neon Mail Server	12	0.00%
MessageWall	10	0.00%
ModusMail	10	0.00%
WebSTAR	8	0.00%
MAILsweeper	3	0.00%

Detailed Breakdown of Revisions on a Per-Server Basis

Exim (575,565 servers)
Version	Number of Servers	Percent
4.82	275,498	47.87%
4.80.1	118,030	20.51%
4.80	103,694	18.02%
4.72	18,440	3.20%
4.76	17,774	3.09%
4.69	13,905	2.42%
4.77	10,849	1.88%
Other	17,375	3.02%
Postfix (321,901 servers)
Version	Number of Servers	Percent
Other	321,901	100.00%
Sendmail (102,630 servers)
Version	Number of Servers	Percent
8.13.8	25,396	24.75%
8.14.5	15,447	15.05%
8.14.4	14,568	14.19%
8.13.1	13,937	13.58%
8.14.3	11,787	11.48%
8.12.11.20060308	3,300	3.22%
8.13.6.20060614	2,812	2.74%
8.14.2	1,942	1.89%
8.14.7	1,902	1.85%
8.11.6	1,506	1.47%
8.12.10	1,288	1.25%
8.14.1	1,210	1.18%
8.13.6	1,031	1.00%
Other	6,504	6.34%
Microsoft (59,046 servers)
Version	Number of Servers	Percent
6.0.3790.4675	47,109	79.78%
6.0.3790.3959	5,430	9.20%
7.5.7601.17514	2,260	3.83%
6.0.3790.1830	1,438	2.44%
Other	2,809	4.76%
MailEnable (31,873 servers)
Version	Number of Servers	Percent
1.986--	3,821	11.99%
6.5--	2,489	7.81%
5.10--	1,792	5.62%
4.26--	1,315	4.13%
6.0--	1,217	3.82%
7.06--	835	2.62%
8.00--	729	2.29%
1.981--	725	2.27%
7.07--	636	2.00%
7.50--	617	1.94%
7.0--	577	1.81%
7.53--	556	1.74%
6.57--	531	1.67%
6.70--	512	1.61%
6.03--	459	1.44%
7.55--	445	1.40%
3.62--	394	1.24%
1.983--	355	1.11%
8.00-8.00-	351	1.10%
0-3.65-	331	1.04%
Other	13,186	41.37%
MDaemon (19,581 servers)
Version	Number of Servers	Percent
13.6.2	1,555	7.94%
11.0.3	1,330	6.79%
13.6.1	1,247	6.37%
13.6.0	1,146	5.85%
11.0.0	1,101	5.62%
13.0.4	1,085	5.54%
13.0.5	981	5.01%
13.5.2	894	4.57%
13.5.1	603	3.08%
10.0.0	601	3.07%
12.5.6	577	2.95%
13.0.3	523	2.67%
10.1.2	489	2.50%
10.1.1	433	2.21%
12.5.4	357	1.82%
13.0.2	354	1.81%
9.6.1	350	1.79%
10.1.0	318	1.62%
9.6.6	314	1.60%
9.6.2	253	1.29%
9.5.2	216	1.10%
10.0.2	196	1.00%
Other	4,658	23.79%
IMail (5,635 servers)
Version	Number of Servers	Percent
12.3.0.100	947	16.81%
8.22	834	14.80%
12.2.0.235	633	11.23%
11.5	391	6.94%
9.23	330	5.86%
8.15	315	5.59%
8.05	236	4.19%
11.03	203	3.60%
10.02	170	3.02%
12.1.0.270	140	2.48%
11.02	126	2.24%
11.01	124	2.20%
7.07	119	2.11%
7.15	105	1.86%
12.2.0.169	102	1.81%
6.06	102	1.81%
8.00	74	1.31%
Other	684	12.14%
Lotus Domino (3,445 servers)
Version	Number of Servers	Percent
8.5.3	563	16.34%
8.5.3FP3	200	5.81%
8.5.2	187	5.43%
8.5.3FP2	152	4.41%
8.5.3FP4	148	4.30%
8.5.1	148	4.30%
7.0.2	127	3.69%
8.5.2FP2	124	3.60%
8.5.3FP5	114	3.31%
8.5	105	3.05%
8.5.3FP6	98	2.84%
8.5.3FP1	97	2.82%
8.5.2FP3	91	2.64%
8.5.2FP4	80	2.32%
7.0.3	71	2.06%
8.5.1FP5	66	1.92%
7.0	53	1.54%
8.5.2FP1	52	1.51%
8.0.1	52	1.51%
6.5.3	51	1.48%
8.0.2	51	1.48%
6.5.4	49	1.42%
6.5.1	49	1.42%
7.0.1	46	1.34%
8.0	39	1.13%
6.5.5	37	1.07%
6.5	36	1.04%
Other	559	16.23%
CommuniGate Pro (2,879 servers)
Version	Number of Servers	Percent
5.1.16	279	9.69%
6.0.7	198	6.88%
6.0.8	161	5.59%
6.0.5	127	4.41%
5.2.20	103	3.58%
4.1.8	101	3.51%
5.3.13	63	2.19%
5.3.15	62	2.15%
5.4.6	58	2.01%
5.4.8	58	2.01%
5.0.14	58	2.01%
4.2.10	57	1.98%
6.0.6	54	1.88%
5.4.11	53	1.84%
5.4.4	53	1.84%
5.4.10	53	1.84%
5.1.12	52	1.81%
5.2.19	50	1.74%
5.2.3	45	1.56%
5.4.1	44	1.53%
6.0.1	44	1.53%
5.2.16	43	1.49%
5.4.5	39	1.35%
6.0.4	38	1.32%
5.4.0	34	1.18%
5.2.14	31	1.08%
Other	921	31.99%
WinWebMail (2,547 servers)
Version	Number of Servers	Percent
3.8.1.3	449	17.63%
3.8.0.1	262	10.29%
3.7.6.1	239	9.38%
3.8.6.1	207	8.13%
3.8.5.1	181	7.11%
3.8.1.5	181	7.11%
3.8.1.1	169	6.64%
3.7.3.1	141	5.54%
3.7.7.3	126	4.95%
3.8.2.1	109	4.28%
3.7.1.1	87	3.42%
3.9.0.1	82	3.22%
3.7.5.1	60	2.36%
3.8.3.1	49	1.92%
3.8.3.3	45	1.77%
3.6.3.1	30	1.18%
3.7.0.5	29	1.14%
3.7.0.3	27	1.06%
Other	74	2.91%
XMail (1,875 servers)
Version	Number of Servers	Percent
1.27	617	32.91%
1.22	485	25.87%
1.25	273	14.56%
1.26	183	9.76%
1.24	116	6.19%
1.21	54	2.88%
1.23	27	1.44%
1.17	25	1.33%
1.20	19	1.01%
Other	76	4.05%
Qmail Toaster (1,431 servers)
Version	Number of Servers	Percent
1.3	1,357	94.83%
1.2	39	2.73%
Other	35	2.45%
Kerio (1,179 servers)
Version	Number of Servers	Percent
6.7.3	214	18.15%
6.7.0	123	10.43%
6.6.2	111	9.41%
6.5.0	89	7.55%
6.5.2	80	6.79%
6.7.2	71	6.02%
6.4.1	62	5.26%
6.3.1	56	4.75%
6.7.1	53	4.50%
6.6.1	48	4.07%
6.4.0	44	3.73%
6.5.1	38	3.22%
6.3.0	28	2.37%
6.4.2	26	2.21%
6.6.0	20	1.70%
6.0.10	16	1.36%
6.2.0	12	1.02%
Other	88	7.46%
SurgeSMTP (981 servers)
Version	Number of Servers	Percent
6.5a-1	257	26.20%
6.3c2-2	120	12.23%
6.4a-1	112	11.42%
5.2a-1	52	5.30%
5.3h2-2	47	4.79%
6.1c-1	41	4.18%
3.9e-1	35	3.57%
6.0a5-5	22	2.24%
3.8k4-4	16	1.63%
6.5b-55	16	1.63%
4.0u4-4	15	1.53%
6.0a4-4	12	1.22%
5.0e4-4	12	1.22%
4.2d2-2	12	1.22%
3.9h-18	11	1.12%
4.2d4-4	10	1.02%
3.8i3-3	10	1.02%
Other	181	18.45%
Merak (896 servers)
Version	Number of Servers	Percent
8.0.3	338	37.72%
8.9.1	108	12.05%
8.5.0	61	6.81%
8.3.8	48	5.36%
7.5.2	45	5.02%
7.6.4	41	4.58%
7.4.5	33	3.68%
7.6.1	16	1.79%
7.2.0	14	1.56%
7.0.1	14	1.56%
9.0.0	13	1.45%
8.3.15	12	1.34%
8.9.0	11	1.23%
7.4.2	10	1.12%
8.2.4	9	1.00%
6.2.1	9	1.00%
Other	114	12.72%
ArGoSoft (515 servers)
Version	Number of Servers	Percent
1.8 (1.8.9.6)	133	25.83%
1.8 (1.8.9.5)	71	13.79%
1.8 (1.8.9.3)	62	12.04%
1.8 (1.8.9.1)	56	10.87%
1.8 (1.8.8.8)	33	6.41%
1.8 (1.8.8.7)	31	6.02%
1.8 (1.8.9.2)	21	4.08%
1.8 (1.8.9.4)	14	2.72%
1.8 (1.8.6.0)	11	2.14%
1.8 (1.8.8.9)	9	1.75%
1.8 (1.8.8.1)	6	1.17%
Other	68	13.20%
Post.Office (297 servers)
Version	Number of Servers	Percent
3.5.3	41	13.80%
4.1.2.4	34	11.45%
4.2.2	22	7.41%
4.1.0.2	22	7.41%
4.0.1	17	5.72%
4.1.1	17	5.72%
3.5.3J	12	4.04%
4.2	11	3.70%
3.9.2.3	11	3.70%
4.1.0.3	8	2.69%
4.1.0.4	7	2.36%
4.2.1.3	6	2.02%
3.1.2J	6	2.02%
3.1.2	5	1.68%
3.9.1.2	5	1.68%
4.1.2.3	5	1.68%
3.8.3	5	1.68%
3.9.1	5	1.68%
3.5.4	4	1.35%
3.9.2	4	1.35%
3.9.1.3	4	1.35%
3.9.2.2	4	1.35%
3.5.1	4	1.35%
4.0.1.1	3	1.01%
4.2.1.2	3	1.01%
4.0.0.1	3	1.01%
3.9.2.1	3	1.01%
3.8.7.4	3	1.01%
4.1	3	1.01%
4.1.2.2	3	1.01%
4.2.1.1	3	1.01%
Other	14	4.71%
GroupWise (295 servers)
Version	Number of Servers	Percent
7.0.3	49	16.61%
8.0.2	39	13.22%
6.5.7	35	11.86%
7.0.4	25	8.47%
7.0.2	21	7.12%
8.0.3	21	7.12%
12.0.2	17	5.76%
6.5.6	13	4.41%
6.5.4	12	4.07%
7.0.1	8	2.71%
8.0.1	8	2.71%
6.0.4	7	2.37%
8.0.0	6	2.03%
12.0.1	5	1.69%
6.5.5	4	1.36%
6.5.2	3	1.02%
6.5.1	3	1.02%
12.0.0	3	1.02%
6.0.1	3	1.02%
7.0	3	1.02%
Other	10	3.39%
MagicMail (294 servers)
Version	Number of Servers	Percent
Other	294	100.00%
Gordano Messaging Suite (GMS) (266 servers)
Version	Number of Servers	Percent
Other	266	100.00%
Trend Micro (230 servers)
Version	Number of Servers	Percent
5.7	93	40.43%
5.5	46	20.00%
5.18	36	15.65%
7.0	23	10.00%
7.1	15	6.52%
8.5	3	1.30%
3.53	3	1.30%
Other	11	4.78%
InterScan VirusWall (98 servers)
Version	Number of Servers	Percent
Other	98	100.00%
Mirapoint (83 servers)
Version	Number of Servers	Percent
4.3.5-GA	12	14.46%
4.4.3-GA	9	10.84%
4.3.6-GA	8	9.64%
4.2.3-GA	6	7.23%
3.10.10a-GA	5	6.02%
4.4.4-GA	5	6.02%
4.4.2a-FCS	4	4.82%
4.1.9-GA	4	4.82%
4.1.10-GA	4	4.82%
4.1.5-GA	3	3.61%
4.1.3-GA	2	2.41%
4.3.3-GA	2	2.41%
4.2.4-GA	2	2.41%
4.3.7-GA	2	2.41%
3.8.3-GA	2	2.41%
3.8.5-GA	2	2.41%
3.8.2-GA	1	1.20%
3.3.3-GR	1	1.20%
4.1.6-GA	1	1.20%
3.7.5a-GA	1	1.20%
3.10.7-GA	1	1.20%
4.1.4-GA	1	1.20%
3.8.7a	1	1.20%
3.7.3a-GA	1	1.20%
3.8.4-GA	1	1.20%
3.10.2-GA	1	1.20%
4.1.8-GA	1	1.20%
Other	0	0.00%
OpenSMTPD (78 servers)
Version	Number of Servers	Percent
Other	78	100.00%
VisNetic (70 servers)
Version	Number of Servers	Percent
9.3.2.0	16	22.86%
9.1.4.1	6	8.57%
8.0.3.1	5	7.14%
5.5.8.3	4	5.71%
8.5.0.8	4	5.71%
6.2.2.0	3	4.29%
5.0.2.3	3	4.29%
9.1.4.0	3	4.29%
7.2.4.1	3	4.29%
5.0.2.0	2	2.86%
8.0.3	2	2.86%
5.8.6.4	2	2.86%
7.6.1.0	2	2.86%
5.4.5.4	2	2.86%
5.8.6.6	2	2.86%
5.3.5.0	2	2.86%
8.3.5.0	1	1.43%
8.3.0.1	1	1.43%
8.3.0.0	1	1.43%
8.5.0.5	1	1.43%
8.0.3.0	1	1.43%
9.1.4.1 da-lax-msg mail.davidco.com	1	1.43%
6.0.9.0	1	1.43%
7.5.3.0	1	1.43%
9.1.4.1 provided by Techfount Systems Pte Ltd	1	1.43%
Other	0	0.00%
Mercury (32 servers)
Version	Number of Servers	Percent
1.48	17	53.12%
3.32	11	34.38%
3.21c	2	6.25%
3.21	1	3.12%
4.x	1	3.12%
Other	0	0.00%
Interscan (25 servers)
Version	Number of Servers	Percent
3.81-Build_1022	5	20.00%
3.55 (build 1016)	4	16.00%
3.81-Build_1084	3	12.00%
3.8-Build_3013	2	8.00%
3.55 (build 1029)	2	8.00%
3.53 (build 1493)	2	8.00%
3.5 (build 1294)	1	4.00%
3.53 (build 2011)	1	4.00%
3.55 (build 1020)	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%
WebSTAR V (24 servers)
Version	Number of Servers	Percent
5.4.1	13	54.17%
5.4.0	5	20.83%
5.3.4	3	12.50%
5.3.2	2	8.33%
5.3.3	1	4.17%
Other	0	0.00%
OpenVMS (23 servers)
Version	Number of Servers	Percent
8.3	10	43.48%
8.4	7	30.43%
7.3	5	21.74%
8.2	1	4.35%
Other	0	0.00%
NetIQ MailMarshal (18 servers)
Version	Number of Servers	Percent
6.0.3.8	11	61.11%
5.5.6.5	2	11.11%
5.5.6.6	2	11.11%
5.5.5.6	1	5.56%
5.5.4.17	1	5.56%
5.5.6.7	1	5.56%
Other	0	0.00%
Neon Mail Server (12 servers)
Version	Number of Servers	Percent
3.0.7	4	33.33%
3.1.4	2	16.67%
3.1.2	2	16.67%
3.1.3	1	8.33%
3.1.0	1	8.33%
3.0.6	1	8.33%
3.0.9	1	8.33%
Other	0	0.00%
MessageWall (10 servers)
Version	Number of Servers	Percent
1.0.8	9	90.00%
1.0.6	1	10.00%
Other	0	0.00%
ModusMail (10 servers)
Version	Number of Servers	Percent
4.35.477.0	6	60.00%
4.1.361.21	1	10.00%
3.2.315.0	1	10.00%
4.35.477.8	1	10.00%
3.1.302.0	1	10.00%
Other	0	0.00%
WebSTAR (8 servers)
Version	Number of Servers	Percent
Other	8	100.00%
MAILsweeper (3 servers)
Version	Number of Servers	Percent
4.3.17.0	2	66.67%
4.3.20.0	1	33.33%
Other	0	0.00%