On 18 Nov 2015, at 10:34, Matt Bayliss wrote:
[4] TCP stream decoded acket capture of above session
http://pastebin.centos.org/36261/
The first line there which should be a SMTP greeting banner is instead:
220
That matches what I see when telnetti
Wietse:
> Note that the last RCPT TO command was not delivered to Postfix. I
> therefore suspect that you have some anti-malware system that breaks
> connections when a client sends suspicious email.
Matt Bayliss:
> I checked the hardware firewall config, which does have a threat detection
> & shu
On 18 November 2015 at 16:18, Wietse Venema wrote:
>
> This ends with:
>
> Nov 18 10:28:52 mailserver postfix/smtpd[31664]: < unknown[1.1.1.1]:
> RCPT TO:
> ...
> Nov 18 10:28:52 mailserver postfix/smtpd[31664]: > unknown[1.1.1.1]:
> 250 2.1.5 Ok
> ...
> Nov 18 10:28:52 mailse
Matt Bayliss:
> [3] Output of /var/log/maillog during the session with debug_peer_list set
> to client
> http://pastebin.centos.org/36256/
This ends with:
Nov 18 10:28:52 mailserver postfix/smtpd[31664]: < unknown[1.1.1.1]: RCPT
TO:
...
Nov 18 10:28:52 mailserver postfix/smtpd[31664]
>> We have discovered an issue in our postfix configuration that appears to
>> limit the amount of recipients permitted in a single message to 100.
>
>This is not the case by default.
I thought it must be but what I'm seeing corresponds to a limit of 100
somewhere, false theory debunked thanks.
>
Viktor Dukhovni:
> The limit of 100 worked well in 1997, and still works well on
> smaller personal mail-servers. Beefier servers with lots memory,
> CPU, disk and network may well be able to handle 1000 or more
> concurrent connections.
Email server performance is primarily limited by file syste
> Hello,
>
> We have discovered an issue in our postfix configuration that appears to
> limit the amount of recipients permitted in a single message to 100.
>
> The issue exhibits itself in the form of our application receiving a
> timeout message after the 100th RCPT TO command and I have reproduc
On Wed, Nov 18, 2015 at 12:31:50PM +, Matt Bayliss wrote:
> We have discovered an issue in our postfix configuration that appears to
> limit the amount of recipients permitted in a single message to 100.
This is not the case by default.
http://www.postfix.org/postconf.5.html#smtpd_recipi
Matt Bayliss:
> Hello,
>
> We have discovered an issue in our postfix configuration that appears to
> limit the amount of recipients permitted in a single message to 100.
Please report Postfix logging, as requested in the mailing
list welcome message.
Wietse
TO REPORT A PROBLEM see http
Hello,
We have discovered an issue in our postfix configuration that appears to
limit the amount of recipients permitted in a single message to 100.
The issue exhibits itself in the form of our application receiving a
timeout message after the 100th RCPT TO command and I have reproduced this
usin
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