[Falkirk] Fwd: 550 5.6.0 improper use of 8-bit data in message body

[Craig Skinner]

MailChip debugged. Quality improvement of 600 million emails every day:

----- Forwarded message -----

Date: Tue, 02 Jun 2015 11:49:37 -0400
From: JXXXX XXXXXXXXXX <XXXXXXXXXXXXXXX at mailchimp.com>
To: Britvault Postmaster <postmaster at britvault.co.uk>
Subject: Re: 550 5.6.0 improper use of 8-bit data in message body

Hey Craig,

I'm sorry for the long delay in replies.

We continued researching the issue and did find cases where we inserted
special characters into the plain-text portion of emails. While this seems to
not cause problems with most servers, it was failing if the 8bitmime setting
is enabled in Postfix. We went ahead and corrected that issue with our latest
release this week, so emails should deliver as expected going forward. If not,
please let me know and we'll investigate further.

We'd like to thank you for bringing this to our attention by sending you a
MailChimp t-shirt or wool cap (pictured here: http://eepurl.com/bpdc8P). Let
me know if you'd prefer a tshirt or one of the caps, and also your mailing
address. I'll get it sent out ASAP.

Thank you again for your help.
JXXXX XXXXXXXXXX
Delivery Engineer
MailChimp


> Britvault Postmaster <mailto:postmaster at britvault.co.uk>
> May 2, 2015 at 3:56 AM
> Hiya again,
> 
> Here's details of another incorrectly formed message
> (notice the unprintable ?? characters from the MTA's log):
> 
> 
> Transcript of session follows.
> 
> Out: 220 teak.britvault.co.uk ESMTP Postfix
> In: EHLO mail27.wdc03.rsgsv.net
> Out: 250-teak.britvault.co.uk
> Out: 250-PIPELINING
> Out: 250-SIZE 10240000
> Out: 250-ETRN
> Out: 250-ENHANCEDSTATUSCODES
> Out: 250-8BITMIME
> Out: 250 DSN
> In: MAIL FROM:<bounce-mc.us7_22517007.1068565-skinner+destiny=britvault.co.uk at mail27.wdc03.rsgsv.net> BODY=8BITMIME
> Out: 250 2.1.0 Ok
> In: RCPT TO:<skinner+destiny at britvault.co.uk>
> Out: 250 2.1.5 Ok
> In: DATA
> Out: 354 End data with <CR><LF>.<CR><LF>
> Out: 550 5.6.0 improper use of 8-bit data in message body
> In: QUIT
> Out: 221 2.0.0 Bye
> 
> 
> For other details, see the local mail logfile
> 
> 
> Apr 30 22:15:50 teak spamlogd[29350]: inbound 205.201.131.27
> Apr 30 22:15:50 teak postfix/smtpd[1360]: connect from mail27.wdc03.rsgsv.net[205.201.131.27]
> Apr 30 22:15:50 teak postfix/smtpd[1360]: 3ld8dL5HFpz2H: client=mail27.wdc03.rsgsv.net[205.201.131.27]
> Apr 30 22:15:50 teak postfix/cleanup[16820]: 3ld8dL5HFpz2H: message-id=<da9705e52dc2e0e9bae1246451db7745c0e.20150430202934 at mail27.wdc03.rsgsv.net>
> Apr 30 22:15:50 teak postfix/cleanup[16820]: 3ld8dL5HFpz2H: reject: mime-error improper use of 8-bit data in message body: Destiny Falkirk ??  Meet Sunday at Graeme High School ?? Callendar Rd ?? Falkirk, Stirlingshire FK1 1 from mail27.wdc03.rsgsv.net[205.201.131.27]; from=<bounce-mc.us7_22517007.1068565-skinner+destiny=britvault.co.uk at mail27.wdc03.rsgsv.net> to=<skinner+destiny at britvault.co.uk>
> Apr 30 22:15:50 teak postfix/cleanup[16820]: 3ld8dL6qgDz2H: message-id=<3ld8dL6qgDz2H at teak.britvault.co.uk>
> Apr 30 22:15:50 teak postfix/smtpd[1360]: disconnect from mail27.wdc03.rsgsv.net[205.201.131.27]
> Apr 30 22:15:50 teak postfix/qmgr[12859]: 3ld8dL6qgDz2H: from=<double-bounce at teak.britvault.co.uk>, size=1087, nrcpt=1 (queue active)
> 
> 

----- End forwarded message -----