On Tue, 2012-07-24 at 07:22 -0500, Stan Hoeppner wrote:
On 7/24/2012 7:13 AM, Morten Stevens wrote:
Jul 24 12:27:32 mx1 sendmail[31933]: q6OARUOM031928: to=dovecot@dovecot.org, delay=00:00:02, xdelay=00:00:01, mailer=esmtp, pri=152317, relay=dovecot.org. [193.210.130.67], dsn=2.0.0, stat=Sent (Ok: queued as 35AF81AE8359) Jul 24 12:28:32 mx1 sendmail[31933]: q6OARUOM031928: to=manu@netbsd.org, delay=00:01:02, xdelay=00:01:00, mailer=esmtp, pri=152317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.0.0, stat=Deferred: Connection timed out with mail.netbsd.org. Jul 24 12:42:57 mx1 sendmail[32292]: q6OARUOM031928: to=manu@netbsd.org, delay=00:15:27, xdelay=00:01:00, mailer=esmtp, pri=242317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.0.0, stat=Deferred: Connection timed out with mail.netbsd.org. Jul 24 12:50:53 mx1 sendmail[32518]: q6OARUOM031928: to=manu@netbsd.org, delay=00:23:23, xdelay=00:00:02, mailer=esmtp, pri=332317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, stat=Deferred: 450 4.7.1 manu@netbsd.org: Recipient address rejected: Greylisting in action, please try later Jul 24 12:58:41 mx1 sendmail[312]: q6OARUOM031928: to=manu@netbsd.org, delay=00:31:11, xdelay=00:00:02, mailer=esmtp, pri=422317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, stat=Deferred: 450 4.7.1 manu@netbsd.org: Recipient address rejected: Greylisting in action, please try later Jul 24 13:42:21 mx1 sendmail[1461]: q6OARUOM031928: to=manu@netbsd.org, delay=01:14:51, xdelay=00:00:01, mailer=esmtp, pri=512317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, stat=Deferred: 450 4.7.1 manu@netbsd.org: Recipient address rejected: Greylisting in action, please try later Jul 24 13:50:53 mx1 sendmail[1672]: q6OARUOM031928: to=manu@netbsd.org, delay=01:23:23, xdelay=00:00:02, mailer=esmtp, pri=602317, relay=mail.netbsd.org. [149.20.53.66], dsn=4.7.1, stat=Deferred: 450 4.7.1 manu@netbsd.org: Recipient address rejected: Greylisting in action, please try later
This is exactly the reason why greylisting is bad.
I have yet to hear of a bot that retries. Thus, there's not reason to
they exist
set a wait period more than a few seconds, causing the situation above.
Not surprising Stanley still doesn't get it, how many mail servers have a retry under 10 minutes anyway, sure as hell none at a "few seconds" , and busy servers with queue limits, could mean a msg set to be retried in 10 mins, may still yet take 2 hours to find its spot in a queue (yes, seen it)
Sendmails greet pause as was noted by an earlier poster was not a bad method, but like grey listing, some spam bots adjusted to suit.