For reference, the default timeout in the current release of mailman is 30 seconds.
https://wiki.debian.org/Teams/DSA I believe DSA are responsible for the list server. - - Lee Fuller On Mon, Dec 14, 2015 at 01:41:46PM +0000, Lee Fuller wrote: > Hey there, > > I checked your email address using basic telnet and a measurement tool. > > I identified the likely physicality of your mailbox to be Cincinnati, and > the > server connecting to you in these measurements is in Texas. > > I ran the test in a handful of arrangements but I repeated the general > routine > enough times intentionally to discount causes of likely performance > fluctuation. > > In both tests it is clear that an SMTP transaction takes as long as > 10 seconds to conclude, and that is using plaintext SMTP without actually > having > transferred anything more than a formal greeting of machines. > > I doubt a list server of this size is configured to wait anywhere near 10 > seconds before considering an address unreachable. > RFC 5321, section 4.5.3.2 lists the various timesouts that an SMTP client SHOULD employ (noting that they MUST be per-command, not on the whole transaction). They include: * Time to Initial 220 message: 5 minutes * Response to MAIL or RCPT command: 5 minutes * Waiting for "354 Start Input" after issueing "DATA": 3 minutes * Waiting for next command from server: 5 minutes So, any client that disconnects after waiting only 10 seconds is, while not explicitly spammy, at least poorly behaved. > That's probably the cause of your issues as you describe them. > > > > - > - Lee Fuller > >
