postfix-users

Re: Email error

Subject: Re: Email error
From: Leonardo Rodrigues Magalhães <leolistas AT solutti.com DOT br>
To: postfix-users AT postfix DOT org
Date: Wed, 08 Aug 2007 13:08:37 -0300


Ralf Hildebrandt escreveu:
* Ralf Hildebrandt <Ralf.Hildebrandt AT charite DOT de>:

   mail:/home/tecno2 # telnet mx.uol.com.br 25
   Trying 200.221.29.129...
   Connected to mx.uol.com.br.
   Escape character is '^]'.
Does not work. Where's the banner?

That's fucked up:

mail:~# telnet mx.uol.com.br 25
Trying 200.221.29.129...
Connected to mx.uol.com.br.
Escape character is '^]'.
Connection closed by foreign host.

Ah, much better after the 4th try:

# telnet mx.uol.com.br 25
Trying 200.221.29.129...
Connected to mx.uol.com.br.
Escape character is '^]'.
220 starfury13.uol.com.br ESMTP


UOL is one of the biggest, if not THE biggest, ISP from Brazil. It has a HUGE base of email users as well as customer hosted domains. From time to time their email system get screwed and things like this one starts to happen.

On December/2006 UOL had VERY similar problem like this one. On the date, i posted a message to a brazilian mailing list of sysadmins regarding the problem:

(messares are in Brazilian Portuguese)
http://eng.registro.br/pipermail/masoch-l/2006-December/003568.html

Other person, on the same mailing list, on September 2006, also regarding problems with UOL:

(messares are in Brazilian Portuguese)
http://eng.registro.br/pipermail/masoch-l/2006-September/003192.html

And so, from time to time, UOL do have problem with emails which make messages stay for sometime on the queues. Most of the time, tough, messages are delivered. The problem is our users are always expecting messages to be delivered immediately, not in 48 hours :(

Luckly, things will back to normal 'automagically' on some days. Experience shows me that when UOL have problems, there's absolutely nothing you can do but wait. Call their tech support wont help, even for their customers, because their system is ALWAYS 'working properly'.


--


        Atenciosamente / Sincerily,
        Leonardo Rodrigues
        Solutti Tecnologia
        http://www.solutti.com.br

        Minha armadilha de SPAM, NÃO mandem email
        gertrudes AT solutti.com DOT br
        My SPAMTRAP, do not email it




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