The mailing list for users of the eduroam Configuration Assistant Tool (CAT)

["humberto.parreira" <humberto.parreira AT uftm.edu.br>]

Hi,

we are using the security connection in the number  port 587 with the TLS  
protocol in our server (mail.uftm.edu.br) because it's one the best  
practics of security in computer networking.

Too, we aren't using protocol IPV6 ( AAAA) in our enviroment.

Please, use the informations mencioned for new tests.

Tks,

Humberto



Stefan Winter gravar:

> Hello,
>
> sorry for the delay. I am still investigating this issue.
>
> I have meanwhile sent a mail to Humberto from my own mail client. He
> wrote back, so mail works in a way.
>
> I am now looking very closely at our server's debug log to figure out
> why it does not work from CAT. I see things like this:
>
> 1540887950.5446 (5)  [/core/common/OutsideComm.php /
> mailAddressValidSecure / 311] Domain: uftm.edu.br MX: Array
> (
>     [0] => Array
>         (
>             [host] => uftm.edu.br
>             [class] => IN
>             [ttl] => 10800
>             [type] => MX
>             [pri] => 5
>             [target] => mail.uftm.edu.br
>         )
>
> )
>
> [ I confirmed with "dig" that these are the actual MX settings for that
> domain ]
>
> 1540887950.7965 (5)  [/core/common/OutsideComm.php /
> mailAddressValidSecure / 311] Domain: uftm.edu.br Addrs: Array
> (
>     [0] => 200.131.62.18
> )
>
> [ Again, I confirmed that this is the only A record of that mail host,
> and it does not have any AAAA records ]
>
> 1540887950.7967 (5)  [/core/common/OutsideComm.php /
> mailAddressValidSecure / 311] OutsideComm::mailAddressValidSecure:
> connecting to 200.131.62.18.
> 1540887980.8072 (5)  [/core/common/OutsideComm.php /
> mailAddressValidSecure / 311] OutsideComm::mailAddressValidSecure:
> failed 200.131.62.18.
>
> The function attempts to connect on port TCP/25 (using PHPMailer's
> "SMTP" class). The attempt to connect fails, and the code concludes that
> it cannot send email.
>
> Indeed, if I try a simple telnet session to that IP address on port
> TCP/25, I get the same failure:
>
> swinter@aragorn:~> telnet 200.131.62.18 25
> Trying 200.131.62.18...
> ^C
>
> So, I believe it is safe to say that the mail configuration of
> uftm.edu.br is somewhat incorrect.
>
> Of course, now remains the question why the mail as sent by my
> Thunderbird did get through? Well, for very historical reasons the
> E-Mail system has a number of fallbacks if MX records for a given domain
> do not exist or do not work. CAT does not consider these fallbacks for
> its STARTTLS and reachability checks.
>
> Frankly, I don't even know what exactly those fallbacks are - something
> about sending to the A record instead of the MX? - but I also don't care
> much: every domain on the internet which wishes to receive email should
> better have a working MX record in DNS.
>
> Once uftm.edu.br brings its DNS information up to speed with deployed
> reality there should be no issue with sending email to them any more.
>
> Greetings,
>
> Stefan Winter
>
> Am 26.10.18 um 13:31 schrieb Anderson P. Almeida:
> > Hi,
> >
> >
> >  the error persists only when I send to these two e-mail accounts:  
> humberto.parreira AT uftm.edu.br and jihann.fernandes AT uftm.edu.br. The  
> accounts are from the UFTM (screenshots).
> > Tks.
> >
> >
> > Anderson P. Almeida
> > Serviços e P&D - PoP-AL
> > RNP – Rede Nacional de Ensino e Pesquisa
> > http://pop-al.rnp.br
> > http://www.rnp.br
> > Fone:+55(82)3315-4999/Ramal:8201
> >
> > ----- Mensagem original -----
> > De: "Stefan Winter" <stefan.winter AT restena.lu>
> > Para: "Anderson P. Almeida" <anderson.almeida AT rnp.br>, 
> > cat-users AT lists.geant.org
> > Enviadas: Sexta-feira, 26 de Outubro de 2018 4:15:56
> > Assunto: Re: [[cat-users]] "The invitation email could not be sent!"
> >
> > Hello,
> >
> > >      when I send the invitation to the contacts of a certain  
> institution happens the error "The invitation email could not be sent!".
> > >      What causes this (screenshots)?
> >
> > Was this a one-time error or does it continue to happen?
> >
> > Greetings,
> >
> > Stefan Winter
> >
> > > Thanks.
> > >
> > >
> > > Atenciosamente,
> > > Anderson P. Almeida
> > > Serviços e P&D - PoP-AL
> > > RNP – Rede Nacional de Ensino e Pesquisa
> > > http://pop-al.rnp.br
> > > http://www.rnp.br
> > > Fone:+55(82)3315-4999/Ramal:8201
> > >
> > > To unsubscribe, send this message: 
> > > mailto:sympa AT lists.geant.org?subject=unsubscribe%20cat-users
> > > Or use the following link: https://lists.geant.org/sympa/sigrequest/cat-users
>
>
> --
> Stefan WINTER
> Ingenieur de Recherche
> Fondation RESTENA - Réseau Téléinformatique de l'Education Nationale et
> de la Recherche
> 2, avenue de l'Université
> L-4365 Esch-sur-Alzette
>
> Tel: +352 424409 1
> Fax: +352 422473
>
> PGP key updated to 4096 Bit RSA - I will encrypt all mails if the
> recipient's key is known to me
>
> http://pgp.mit.edu:11371/pks/lookup?op=get&search=0xC0DE6A358A39DC66

--
--
Humberto da Silva Parreira
Analista de TI
Departamento de Tecnologia da Informação – DTI
Prefeitura Universitária
Universidade Federal do Triângulo Mineiro – UFTM

Rua do Carmo, 143 – Bairro Nossa Senhora da Abadia
CEP: 38025-000 – Uberaba/MG
Tel.: (34) 3700-6410 / 3700-6401
Curriculum Lattes:  http://lattes.cnpq.br/0956387871885319