Re: 553 error after data not noticed?

On Wed, Nov 10, 2004 at 01:45:55PM -0500, Wietse Venema wrote:

> > Perhaps my expectations are wrong. What do I expect:
> >
> > -1- postfix sends data and quit (pipelining is active)
> > -2- remote server answers to end-of-data with a 553 error
> > -3- postfix recognizes the answer to end-of-data
> >
> > Before I continue and try disabling pipelining for this host,
> > is it worth to debug the problem more? If so, any suggestions?
>
> Yes. Don't ignore the TCP sequence numbers and TCP flags.


1 Out: S 1885667263:1885667263(0) win 5840 <mss 1460,sackOK,timestamp 561648501 0,nop,wscale 0> (DF)
2 Out: S 1885667263:1885667263(0) win 5840 <mss 1460,sackOK,timestamp 561648801 0,nop,wscale 0> (DF)
3 In: S 3327059329:3327059329(0) ack 1885667264 win 1460 <mss 1460,nop,wscale 0,nop,nop,timestamp 1528599302 561648801> (DF)
4 Out: . ack 1 win 5840 <nop,nop,timestamp 561649152 1528599302> (DF)
5 In: P 1:21(20) ack 1 win 57920 <nop,nop,timestamp 1528599355 561649152> (DF)
6 Out: . ack 21 win 5840 <nop,nop,timestamp 561649204 1528599355> (DF)
7 Out: P 1:31(30) ack 21 win 5840 <nop,nop,timestamp 561649204 1528599355> (DF)
8 In: P 21:65(44) ack 31 win 57920 <nop,nop,timestamp 1528599406 561649204> (DF)
9 Out: P 31:104(73) ack 65 win 5840 <nop,nop,timestamp 561649255 1528599406> (DF)
10 In: . ack 104 win 57920 <nop,nop,timestamp 1528599468 561649255> (DF)
11 In: P 65:104(39) ack 104 win 57920 <nop,nop,timestamp 1528599477 561649255> (DF)
12 Out: . 104:1552(1448) ack 104 win 5840 <nop,nop,timestamp 561649328 1528599477> (DF)
13 Out: . 1552:3000(1448) ack 104 win 5840 <nop,nop,timestamp 561649328 1528599477> (DF)
14 Out: P 3000:3571(571) ack 104 win 5840 <nop,nop,timestamp 561649328 1528599477> (DF)
15 In: . ack 3000 win 56472 <nop,nop,timestamp 1528599531 561649328> (DF)
16 In: P 104:150(46) ack 3571 win 57920 <nop,nop,timestamp 1528599537 561649328> (DF)
17 In: F 150:150(0) ack 3571 win 57920 <nop,nop,timestamp 1528599537 561649328> (DF)
18 Out: F 3571:3571(0) ack 151 win 5840 <nop,nop,timestamp 561649389 1528599537> (DF)
19 In: . ack 3572 win 57920 <nop,nop,timestamp 1528599591 561649389> (DF)


Frame 7: EHLO
Frame 8: 250 message
Frame 9: Mail from, rcpt to, data
Frame 10: Acknowledgement for frame 9
Frame 11: 250 OK 250 OK 354 Go Ahead
Frame 12-14: the message, crlf, single dot, crlf, quit, crlf
Frame 15: acknowledgement for frames 12 and 13
Frame 16: 553 message, and piggy back acknowledgement of frame 14
Frame 17-19: premature close of the connection, and acknowledgement of frame 16


I understand that the remote host should not close the connection after
the 553 error; I do not understand why postfix doesn't see the 553 message.

Am I missing something obvious perhaps?

TIA
Alex