And here, though the first connect took ~6 seconds or so.
```
swaks -6 -f 'none' -t testing@relay -s rrmx.imp.ch --quit-after helo
=== Trying rrmx.imp.ch:25...
=== Connected to rrmx.imp.ch.
<- 220 idefix.imp.ch ESMTP Postfix
-> EHLO s4.libertad.link
<- 250-idefix.imp.ch
<- 250-PIPELINING
<- 250-SIZE 26214400
<- 250-VRFY
<- 250-ETRN
<- 250-STARTTLS
<- 250-ENHANCEDSTATUSCODES
<- 250-8BITMIME
<- 250 DSN
-> QUIT
<- 221 2.0.0 Bye
```
On 16 May 2019, at 21:59, Sébastien Riccio via mailop wrote:
Hi,
Same from here, hosts responds to v6 :
Trying 2001:4060:1:1001::12:5...
Connected to 2001:4060:1:1001::12:5.
Escape character is '^]'.
220-obelix.imp.ch ESMTP Postfix
Trying 2001:4060:1:1001::12:4...
Connected to 2001:4060:1:1001::12:4.
Escape character is '^]'.
220-asterix.imp.ch ESMTP Postfix
Trying 2001:4060:1:1001::12:6...
Connected to 2001:4060:1:1001::12:6.
Escape character is '^]'.
220-idefix.imp.ch ESMTP Postfix
Sébastien RICCIO
SYSTEM ADMINISTRATOR
P +41 840 888 888
F +41 840 888 000
M [email protected]<mailto:[email protected]>
From: mailop <[email protected]> On Behalf Of Noel Butler via
mailop
Sent: vendredi, 17 mai 2019 04:55
To: [email protected]
Subject: Re: [mailop] Anyone on this List with Access to Amazon SES
Maillogs?
Connected to 2001:4060:1:1001::12:5.
Escape character is '^]'.
220-obelix.imp.ch ESMTP Postfix
Connected to 2001:4060:1:1001::12:4.
Escape character is '^]'.
220-asterix.imp.ch ESMTP Postfix
Connected to 2001:4060:1:1001::12:6.
Escape character is '^]'.
220-idefix.imp.ch ESMTP Postfix
On 16/05/2019 20:32, Yiorgos [George] Adamopoulos via mailop wrote:
This is what I see:
$ host -t mx leunet.ch<http://leunet.ch>
leunet.ch<http://leunet.ch> mail is handled by 10
rrmx.imp.ch<http://rrmx.imp.ch>.
$ nc -4 -vz rrmx.imp.ch<http://rrmx.imp.ch>. 25
Connection to rrmx.imp.ch<http://rrmx.imp.ch>. 25 port [tcp/smtp]
succeeded!
$ nc -6 -vz rrmx.imp.ch<http://rrmx.imp.ch>. 25
nc: connect to rrmx.imp.ch<http://rrmx.imp.ch>. port 25 (tcp) failed:
Network is unreachable
nc: connect to rrmx.imp.ch<http://rrmx.imp.ch>. port 25 (tcp) failed:
Network is unreachable
nc: connect to rrmx.imp.ch<http://rrmx.imp.ch>. port 25 (tcp) failed:
Network is unreachable
So maybe AWS SES is trying to connect to the IPv6 address and cannot?
On Thu, May 16, 2019 at 11:42 AM Benoit Panizzon via mailop
<[email protected]<mailto:[email protected]>> wrote:
Please contact me off-list
Short story:
A customer of Amazon SES is attempting to send emails to one of our
customers.
Our customer is not getting them, we don't see ANY trace of those
emails in our logs, they just seem to disappear in transit.
Re-Tested yesterday, exact times known.
Long lasting cases have been opened @ Amazon but the only problem,
according to Amazons SES Support is, that the recipient MX is not
correct and we should fix that issue, without Amazon being able to
tell
us what's incorrect (leunet.ch<http://leunet.ch>, do you see any
problem), or that
leunet.ch<http://leunet.ch> does not have a DKIM entriy (cause
disproved by Amazon's own
customer showing that he can perfectly send emails to recipients in
other domains which also do not have a DKIM entry)
Mit freundlichen Grüssen
-Benoît Panizzon-
--
Kind Regards,
Noel Butler
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