Re: [apps-discuss] Mail client configuration via something, maybe WebFinger

Doug Royer <> Wed, 10 February 2016 19:29 UTC

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From: Doug Royer <>
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Date: Wed, 10 Feb 2016 12:29:01 -0700
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Subject: Re: [apps-discuss] Mail client configuration via something, maybe WebFinger
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On 02/10/2016 11:18 AM, John Levine wrote:

> I just tried it, port 587 and STARTTLS works fine.  Perhaps your MUA
> doesn't know that port 587 needs STARTTLS rather than doing the TLS at
> connection time, a bug that should be easy to fix.  Gmail does require
> that you create a separate per-app password on their web site for
> every device that logs into gmail, but automating that seems rather
> beyond what we're looking at here.

More oddities, IPv6 vs IPv4.

From Home ISP (defaults to IPv6 after 2 minute timeout, it tries IPv4 -
really ODD results as it still fails):
  telnet 587
  Trying 2607:f8b0:400e:c04::6d... (wait 2 minutes - time out)
  Trying (wait 2 minutes - time out)
  Trying (wait 2 minutes - time out)

yet, if I telnet directly using IPv4:

  telnet -4 587
  Trying   (note this is the same IPv4 as above)
  Connected to

Makes me think (and unrelated). Are their ISPs that only provide IPv4 vs
IPv6 services? The SRV records point to a host name, not an IP address.

WORKS from Texas: So I ssh'd into a Texas system that I manage and -
everything works, both IPv4 and IPv6 on port 587.

traceroute IPv4 fails for me to port 587. Must be my ISP oddities.
I think my ISP is busted.


Doug Royer - (http://DougRoyer.US)