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

Doug Royer <douglasroyer@gmail.com> Wed, 10 February 2016 19:29 UTC

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To: apps-discuss@ietf.org
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From: Doug Royer <douglasroyer@gmail.com>
Organization: http://SoftwareAndServices.NET
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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 smtp.gmail.com 587
  Trying 2607:f8b0:400e:c04::6d... (wait 2 minutes - time out)
  Trying 74.125.28.108... (wait 2 minutes - time out)
  Trying 74.125.28.109... (wait 2 minutes - time out)
  ...

yet, if I telnet directly using IPv4:

  telnet -4 smtp.gmail.com 587
  Trying 74.125.28.108...   (note this is the same IPv4 as above)
  Connected to gmail-smtp-msa.l.google.com.

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)
DouglasRoyer@gmail.com
714-989-6135