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From: Emanuele Gallo on 11 Apr 2010 08:54
Hi!

I've developed a RFC821-compliant mail server. I want to make it clear
first that my server works well either with a mail client, as
Thunderbird, and with telnet session. I've configured Postfix to
communicate with my server modifying main.cf in this way:

relayhost = [myMailServer.localhost]
smtp_sasl_auth_enable = no
smtp_use_tls = no
disable_dns_lookups=yes
smtp_never_send_ehlo = yes
Then I try to send an email through mail command:

manugal(a)manugal-desktop:~$ mail -v -s "Subject"
Manugal(a)myMailServer.localhost
Hello world!
..
EOT
Mail Delivery Status Report will be mailed to <manugal>.
manugal(a)manugal-desktop:~$
But mail doesn't arrive. Analyzing mail.log I've discovered that Postfix
doesn't receive 250 response (but receive a blank line). Nevertheless,
if I debug my server with gdb, I can see that it sends the string "250
OK\r\n". To do an attempt, then I've tried to send, as a response,
"\r\n250 OK\r\n" (so a 250 response code preceded by a CRLF). And now
response seems arrive at the other side. Look at mail.log:

Apr 10 22:05:36 manugal-desktop postfix/pickup[2846]: 70F9E21BDD:
uid=1000 from=<manugal>
Apr 10 22:05:36 manugal-desktop postfix/cleanup[2859]: 70F9E21BDD:
message-id=<20100410200536.70F9E21BDD(a)manugal-desktop.localdomain>
Apr 10 22:05:36 manugal-desktop postfix/qmgr[2847]: 70F9E21BDD:
from=<manugal(a)manugal-desktop.localdomain>, size=488, nrcpt=1 (queue
active)
Apr 10 22:05:40 manugal-desktop postfix/smtp[2850]: <
myMailServer.localhost[192.168.1.11]:25: 220 myMailServer.localhost SMTP
Service ready
Apr 10 22:05:40 manugal-desktop postfix/smtp[2850]: >
myMailServer.localhost[192.168.1.11]:25: HELO manugal-desktop.localdomain
Apr 10 22:05:46 manugal-desktop postfix/smtp[2850]: <
myMailServer.localhost[192.168.1.11]:25:
Apr 10 22:05:46 manugal-desktop postfix/smtp[2850]: <
myMailServer.localhost[192.168.1.11]:25: 250 OK
Apr 10 22:05:46 manugal-desktop postfix/smtp[2850]: server features:
0x1000 size 0
Apr 10 22:05:46 manugal-desktop postfix/smtp[2850]: >
myMailServer.localhost[192.168.1.11]:25: MAIL
FROM:<manugal(a)manugal-desktop.localdomain>
....

I don't know why replies must be sent in this way. Something is wrong.
I'm sorry for length.

From: Wietse Venema on 11 Apr 2010 09:11
Emanuele Gallo:
> Hi!
>
> I've developed a RFC821-compliant mail server. I want to make it clear
> first that my server works well either with a mail client, as
> Thunderbird, and with telnet session. I've configured Postfix to
> communicate with my server modifying main.cf in this way:
>
> relayhost = [myMailServer.localhost]
> smtp_sasl_auth_enable = no
> smtp_use_tls = no
> disable_dns_lookups=yes
> smtp_never_send_ehlo = yes
> Then I try to send an email through mail command:
>
> manugal(a)manugal-desktop:~$ mail -v -s "Subject"
> Manugal(a)myMailServer.localhost
> Hello world!
> .
> EOT
> Mail Delivery Status Report will be mailed to <manugal>.
> manugal(a)manugal-desktop:~$
> But mail doesn't arrive. Analyzing mail.log I've discovered that Postfix
> doesn't receive 250 response (but receive a blank line). Nevertheless,
> if I debug my server with gdb, I can see that it sends the string "250
> OK\r\n". To do an attempt, then I've tried to send, as a response,
> "\r\n250 OK\r\n" (so a 250 response code preceded by a CRLF). And now
> response seems arrive at the other side. Look at mail.log:

If you want help, capture a recording of a FAILED SMTP session with:

# tcpdump -w /file/name -s 0 host your.ip.adress and port 25

as a binary attachment, after checking that this file contains no
private email.

Wietse

From: Emanuele Gallo on 11 Apr 2010 14:20
Sorry, can you tell me how can I send binary attachments in this mailing
list? Thanks.

Il 11/04/2010 15:11, Wietse Venema ha scritto:
> Emanuele Gallo:
>
>> Hi!
>>
>> I've developed a RFC821-compliant mail server. I want to make it clear
>> first that my server works well either with a mail client, as
>> Thunderbird, and with telnet session. I've configured Postfix to
>> communicate with my server modifying main.cf in this way:
>>
>> relayhost = [myMailServer.localhost]
>> smtp_sasl_auth_enable = no
>> smtp_use_tls = no
>> disable_dns_lookups=yes
>> smtp_never_send_ehlo = yes
>> Then I try to send an email through mail command:
>>
>> manugal(a)manugal-desktop:~$ mail -v -s "Subject"
>> Manugal(a)myMailServer.localhost
>> Hello world!
>> .
>> EOT
>> Mail Delivery Status Report will be mailed to<manugal>.
>> manugal(a)manugal-desktop:~$
>> But mail doesn't arrive. Analyzing mail.log I've discovered that Postfix
>> doesn't receive 250 response (but receive a blank line). Nevertheless,
>> if I debug my server with gdb, I can see that it sends the string "250
>> OK\r\n". To do an attempt, then I've tried to send, as a response,
>> "\r\n250 OK\r\n" (so a 250 response code preceded by a CRLF). And now
>> response seems arrive at the other side. Look at mail.log:
>>
> If you want help, capture a recording of a FAILED SMTP session with:
>
> # tcpdump -w /file/name -s 0 host your.ip.adress and port 25
>
> as a binary attachment, after checking that this file contains no
> private email.
>
> Wietse
>
>

From: Emanuele Gallo on 11 Apr 2010 13:58
Sorry, can you tell me how can I send a binary attachment?

Il 11/04/2010 15:11, Wietse Venema ha scritto:
> Emanuele Gallo:
>
>> Hi!
>>
>> I've developed a RFC821-compliant mail server. I want to make it clear
>> first that my server works well either with a mail client, as
>> Thunderbird, and with telnet session. I've configured Postfix to
>> communicate with my server modifying main.cf in this way:
>>
>> relayhost = [myMailServer.localhost]
>> smtp_sasl_auth_enable = no
>> smtp_use_tls = no
>> disable_dns_lookups=yes
>> smtp_never_send_ehlo = yes
>> Then I try to send an email through mail command:
>>
>> manugal(a)manugal-desktop:~$ mail -v -s "Subject"
>> Manugal(a)myMailServer.localhost
>> Hello world!
>> .
>> EOT
>> Mail Delivery Status Report will be mailed to<manugal>.
>> manugal(a)manugal-desktop:~$
>> But mail doesn't arrive. Analyzing mail.log I've discovered that Postfix
>> doesn't receive 250 response (but receive a blank line). Nevertheless,
>> if I debug my server with gdb, I can see that it sends the string "250
>> OK\r\n". To do an attempt, then I've tried to send, as a response,
>> "\r\n250 OK\r\n" (so a 250 response code preceded by a CRLF). And now
>> response seems arrive at the other side. Look at mail.log:
>>
> If you want help, capture a recording of a FAILED SMTP session with:
>
> # tcpdump -w /file/name -s 0 host your.ip.adress and port 25
>
> as a binary attachment, after checking that this file contains no
> private email.
>
> Wietse
>
>

From: Wietse Venema on 11 Apr 2010 14:53
Emanuele Gallo:
> Sorry, can you tell me how can I send binary attachments in this mailing
> list? Thanks.

You have a gmail address, so you would use the "attach a file" link
under "Subject".

If the file is large, then you should mail an URL instead of
attaching the file.

Wietse

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