Hurricane Electric's IPv6 Tunnel Broker Forums

Advanced search  

News:

Welcome to Hurricane Electric's Tunnelbroker.net forums!

Author Topic: Unexpected Banner  (Read 3456 times)

gungthar

  • Newbie
  • *
  • Posts: 3
Unexpected Banner
« on: May 23, 2017, 04:29:42 PM »

On the enthusiast level test, upon sending my mail to my postfix configured email server, I'm given the error "Unexpected banner:". Any idea what this could be?
Logged

divad27182

  • Jr. Member
  • **
  • Posts: 61
Re: Unexpected Banner
« Reply #1 on: May 24, 2017, 08:05:09 AM »

On the enthusiast level test, upon sending my mail to my postfix configured email server, I'm given the error "Unexpected banner:". Any idea what this could be?
Banner probably refers to the first line of text that the SMTP server outputs.  It should probably look like:
Code: [Select]
220 [i]hostname[/i] ESMTP [i]packagename[/i]There might legitimately be several lines all but the last start with "220-".  If, when you connect to port 25, you see anything other than these, then that is probably the problem.  Typically, test this with something like "telnet -6 hostname 25"

--David

Logged

born2host

  • Newbie
  • *
  • Posts: 4
Re: Unexpected Banner
« Reply #2 on: October 13, 2019, 01:04:54 PM »

Hi there,
I have the same problem with the Unexpected Banner, but when I telnet localhost I see this:
[darkness@srv ~]$ telnet -6 localhost 25
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 srv.mydomain.com ESMTP Postfix
quit
221 2.0.0 Bye
Connection closed by foreign host.
[darkness@srv ~]$
Then I do test to the IPv6:
[darkness@srv ~]$ telnet -6 2001:470:1f1b:ba:2001:470:1f1b:ba 25
Trying 2001:470:1f1b:ba:2001:470:1f1b:ba...
Connected to 2001:470:1f1b:ba:2001:470:1f1b:ba.
Escape character is '^]'.
220 srv.born2host.com ESMTP Postfix
quit
221 2.0.0 Bye
Connection closed by foreign host.
[darkness@srv ~]$
As I see from the previous comment it needs to be "220" and it is. At least HE to tell what banner they are expecting.
« Last Edit: October 13, 2019, 01:10:12 PM by born2host »
Logged

snarked

  • Hero Member
  • *****
  • Posts: 762
Re: Unexpected Banner
« Reply #3 on: October 14, 2019, 08:06:14 AM »

Per your text, different banners (host names) are being sent for IPv4 and IPv6.  Therefore, one of them doesnít match the expected host name (manually entered or from the MX-RR).  Maybe thatís the problem.
Logged

born2host

  • Newbie
  • *
  • Posts: 4
Re: Unexpected Banner
« Reply #4 on: October 14, 2019, 01:48:58 PM »

Sorry. It's my bad. I edited the first output to srv.mydomain.com. Both of them have only one domain and it's the same.
Logged

born2host

  • Newbie
  • *
  • Posts: 4
Re: Unexpected Banner
« Reply #5 on: November 02, 2019, 04:24:19 AM »

[root@srv init.d]# telnet -6 localhost 25
Trying ::1...
Connected to localhost.
Escape character is '^]'.
220 born2host.com ESMTP Postfix
quit
221 2.0.0 Bye
Connection closed by foreign host.
[root@srv init.d]# telnet -6 2001:470:1f08:7e::8 25
Trying 2001:470:1f08:7e::8...
Connected to 2001:470:1f08:7e::8.
Escape character is '^]'.
220 born2host.com ESMTP Postfix
quit
221 2.0.0 Bye
Connection closed by foreign host.
[root@srv init.d]#

Is it possible to see "Unexpected banner:" from HE because I use PostFix Mail server and they expect Exim or something else as mail server where the banners are different?
Logged

kriteknetworks

  • Sr. Member
  • ****
  • Posts: 261
    • aRDy Music
Re: Unexpected Banner
« Reply #6 on: November 02, 2019, 08:00:25 AM »

telnet -6 2001:470:1f08:7e::8 25
Trying 2001:470:1f08:7e::8...
telnet: connect to address 2001:470:1f08:7e::8: Connection refused
Logged