On Mon, Aug 02, 2004 at 02:45:22AM +0100, Matt Sergeant wrote:
> > Has anyone really seen real clients being disconnected by this plugin?
>
> Theo told me at OSCon that gmail early talk.
I just checked this with my gmail account, and it does indeed start
transmitting early. However, when it receives a 4xx-greeting from qpsmtpd,
it seems to connect again, wait for the greeting this time, then transmit
normally. Their MTAs may be caching or sharing their observations of how
the far side reacts to early pipelining, because it seems on some occasions
when a gmail user sends mail to a qpsmtpd host twice in close succession,
that the second time gmail waits for the greeting the first time.
Here's how it tends to go. This was with a 20-second earlytalker wait time.
20:29:07.326194 IP rproxy.gmail.com.42919 > atlantic.devin.com.smtp: S
3552646395:3552646395(0) win 8190 <mss 1460>
0x0000: 4500 002c 1817 0000 f506 e084 40e9 aace E..,[EMAIL PROTECTED]
0x0010: 403e a13a a7a7 0019 d3c1 14fb 0000 0000 @>.:............
0x0020: 6002 1ffe 1a7b 0000 0204 05b4 0000 `....{........
20:29:07.326428 IP atlantic.devin.com.smtp > rproxy.gmail.com.42919: S
4226738759:4226738759(0) ack 3552646396 win 5840 <mss 1460>
0x0000: 4500 002c 0000 4000 4006 6d9c 403e a13a E..,[EMAIL PROTECTED]@.m.@>.:
0x0010: 40e9 aace 0019 a7a7 fbee ea47 d3c1 14fc @..........G....
0x0020: 6012 16d0 3d61 0000 0204 05b4 `...=a......
20:29:07.399940 IP rproxy.gmail.com.42919 > atlantic.devin.com.smtp: . ack 1 win 8190
0x0000: 4500 0028 5717 0000 f506 a188 40e9 aace E..([EMAIL PROTECTED]
0x0010: 403e a13a a7a7 0019 d3c1 14fc fbee ea48 @>.:...........H
0x0020: 5010 1ffe 4bf0 0000 0000 0000 0000 P...K.........
20:29:07.400010 IP rproxy.gmail.com.42919 > atlantic.devin.com.smtp: F 1:1(0) ack 1
win 8190
0x0000: 4500 0028 5917 0000 f506 9f88 40e9 aace E..([EMAIL PROTECTED]
0x0010: 403e a13a a7a7 0019 d3c1 14fc fbee ea48 @>.:...........H
0x0020: 5011 1ffe 4bef 0000 0000 0000 0000 P...K.........
20:29:07.400195 IP rproxy.gmail.com.42921 > atlantic.devin.com.smtp: S
3552891014:3552891014(0) win 8190 <mss 1428>
0x0000: 4500 002c 5a17 0000 f506 9e83 40e9 aacf E..,[EMAIL PROTECTED]
0x0010: 403e a13a a7a9 0019 d3c4 d086 0000 0000 @>.:............
0x0020: 6002 1ffe 5f09 0000 0204 0594 0000 `..._.........
20:29:07.400339 IP atlantic.devin.com.smtp > rproxy.gmail.com.42921: S
4220524148:4220524148(0) ack 3552891015 win 5840 <mss 1460>
0x0000: 4500 002c 0000 4000 4006 6d9b 403e a13a E..,[EMAIL PROTECTED]@.m.@>.:
0x0010: 40e9 aacf 0019 a7a9 fb90 1674 d3c4 d087 @..........t....
0x0020: 6012 16d0 5601 0000 0204 05b4 `...V.......
20:29:07.406757 IP atlantic.devin.com.smtp > rproxy.gmail.com.42919: . ack 2 win 5840
0x0000: 4500 0028 0f6d 4000 4006 5e33 403e a13a E..([EMAIL PROTECTED]@.^3@>.:
0x0010: 40e9 aace 0019 a7a7 fbee ea48 d3c1 14fd @..........H....
0x0020: 5010 16d0 551d 0000 P...U...
20:29:07.474067 IP rproxy.gmail.com.42921 > atlantic.devin.com.smtp: . ack 1 win 8190
0x0000: 4500 0028 a817 0000 f506 5087 40e9 aacf E..([EMAIL PROTECTED]
0x0010: 403e a13a a7a9 0019 d3c4 d087 fb90 1675 @>.:...........u
0x0020: 5010 1ffe 6490 0000 0000 0000 0000 P...d.........
20:29:11.024901 IP atlantic.devin.com.smtp > rproxy.gmail.com.42919: P 1:64(63) ack 2
win 5840
0x0000: 4500 0067 0f6e 4000 4006 5df3 403e a13a [EMAIL PROTECTED]@.].@>.:
0x0010: 40e9 aace 0019 a7a7 fbee ea48 d3c1 14fd @..........H....
0x0020: 5018 16d0 dabc 0000 3435 3020 436f 6e6e P.......450.Conn
0x0030: 6563 7469 6e67 2068 6f73 7420 7374 6172 ecting.host.star
0x0040: 7465 6420 7472 616e 736d 6974 7469 6e67 ted.transmitting
0x0050: 2062 6566 6f72 6520 534d 5450 2067 7265 .before.SMTP.gre
0x0060: 6574 696e 670d 0a eting..
20:29:11.098463 IP rproxy.gmail.com.42919 > atlantic.devin.com.smtp: . ack 64 win 8190
0x0000: 4500 0028 642d 0000 f506 9472 40e9 aace E..([EMAIL PROTECTED]
0x0010: 403e a13a a7a7 0019 d3c1 14fd fbee ea87 @>.:............
0x0020: 5010 1ffe 4bb0 0000 0000 0000 0000 P...K.........
20:29:11.108092 IP atlantic.devin.com.smtp > rproxy.gmail.com.42919: F 64:64(0) ack 2
win 5840
0x0000: 4500 0028 0f6f 4000 4006 5e31 403e a13a E..([EMAIL PROTECTED]@.^1@>.:
0x0010: 40e9 aace 0019 a7a7 fbee ea87 d3c1 14fd @...............
0x0020: 5011 16d0 54dd 0000 P...T...
20:29:11.181519 IP rproxy.gmail.com.42919 > atlantic.devin.com.smtp: . ack 65 win 8190
0x0000: 4500 0028 c22d 0000 f506 3672 40e9 aace E..([EMAIL PROTECTED]
0x0010: 403e a13a a7a7 0019 d3c1 14fd fbee ea88 @>.:............
0x0020: 5010 1ffe 4baf 0000 0000 0000 0000 P...K.........
20:29:31.207430 IP atlantic.devin.com.smtp > rproxy.gmail.com.42921: P 1:89(88) ack 1
win 5840
0x0000: 4500 0080 f359 4000 4006 79ed 403e a13a [EMAIL PROTECTED]@.y.@>.:
0x0010: 40e9 aacf 0019 a7a9 fb90 1675 d3c4 d087 @..........u....
0x0020: 5018 16d0 a895 0000 3232 3020 6174 6c61 P.......220.atla
0x0030: 6e74 6963 2e64 6576 696e 2e63 6f6d 2045 ntic.devin.com.E
0x0040: 534d 5450 2071 7073 6d74 7064 2030 2e32 SMTP.qpsmtpd.0.2
0x0050: 3820 7265 6164 793b 2073 656e 6420 7573 8.ready;.send.us
0x0060: 2079 6f75 7220 6d61 696c 2c20 6275 7420 .your.mail,.but.
0x0070: 6e6f 7420 796f 7572 2073 7061 6d2e 0d0a not.your.spam...
20:29:31.281383 IP rproxy.gmail.com.42921 > atlantic.devin.com.smtp: . ack 89 win 5720
0x0000: 4510 0028 f0bf 0000 3606 c6cf 40e9 aacf E..([EMAIL PROTECTED]
0x0010: 403e a13a a7a9 0019 d3c4 d087 fb90 16cd @>.:............
0x0020: 5010 1658 6dde 0000 0000 0000 0000 P..Xm.........
20:29:31.281594 IP rproxy.gmail.com.42921 > atlantic.devin.com.smtp: P 1:24(23) ack 89
win 5720
0x0000: 4510 003f f0c0 0000 3606 c6b7 40e9 aacf [EMAIL PROTECTED]
0x0010: 403e a13a a7a9 0019 d3c4 d087 fb90 16cd @>.:............
0x0020: 5018 1658 531f 0000 4548 4c4f 206d 7072 P..XS...EHLO.mpr
0x0030: 6f78 792e 676d 6169 6c2e 636f 6d0d 0a oxy.gmail.com..
20:29:31.283103 IP atlantic.devin.com.smtp > rproxy.gmail.com.42921: . ack 24 win 5840
0x0000: 4500 0028 f35a 4000 4006 7a44 403e a13a E..([EMAIL PROTECTED]@.zD@>.:
0x0010: 40e9 aacf 0019 a7a9 fb90 16cd d3c4 d09e @...............
0x0020: 5010 16d0 6d4f 0000 P...mO..
20:29:31.293540 IP atlantic.devin.com.smtp > rproxy.gmail.com.42921: P 89:150(61) ack
24 win 5840
0x0000: 4500 0065 f35b 4000 4006 7a06 403e a13a [EMAIL PROTECTED]@.z.@>.:
0x0010: 40e9 aacf 0019 a7a9 fb90 16cd d3c4 d09e @...............
0x0020: 5018 16d0 9df2 0000 3235 302d 6174 6c61 P.......250-atla
0x0030: 6e74 6963 2e64 6576 696e 2e63 6f6d 2048 ntic.devin.com.H
0x0040: 6920 5b36 342e 3233 332e 3137 302e 3230 i.[64.233.170.20
0x0050: 375d 205b 3634 2e32 3333 2e31 3730 2e32 7].[64.233.170.2
0x0060: 3037 5d0d 0a 07]..
20:29:31.406284 IP rproxy.gmail.com.42921 > atlantic.devin.com.smtp: . ack 150 win 5720
0x0000: 4510 0028 f0c1 0000 3606 c6cd 40e9 aacf E..([EMAIL PROTECTED]
0x0010: 403e a13a a7a9 0019 d3c4 d09e fb90 170a @>.:............
0x0020: 5010 1658 6d8a 0000 0000 0000 0000 P..Xm.........
20:29:31.407466 IP atlantic.devin.com.smtp > rproxy.gmail.com.42921: P a13a [EMAIL
PROTECTED]@.y.@>.:
0x0010: 40e9 aacf 0019 a7a9 fb90 173b d3c4 d0be @..........;....
0x0020: 5018 16d0 2ee6 0000 3235 3020 3c63 6172 P.......250.<car
0x0030: 7261 7761 7940 676d 6169 6c2e 636f 6d3e [EMAIL PROTECTED]>
0x0040: 2c20 7365 6e64 6572 204f 4b20 2d20 686f ,.sender.OK.-.ho
0x0050: 7720 6578 6369 7469 6e67 2074 6f20 6765 w.exciting.to.ge
0x0060: 7420 6d61 696c 2066 726f 6d20 796f 7521 t.mail.from.you!
0x0070: 0d0a ..
