[Pkg-exim4-users] sporadic invalid helo -- setting primary_hostname

[Jonathan Addleman]

On 02/03/16 11:06 AM, J G Miller wrote:
> At 22:37h, on Tuesday, March 01, 2016,
> in message <56D65FF7.90302 at redowl.ca>,
> on the subject of "Re: [Pkg-exim4-users] sporadic invalid helo -- setting primary_hostname",
> Jonathan Addleman reported --
>
>   > Thanks, that helps a lot! I'm a little wary of this fix though, because
>   > the docs say pretty clearly "Please refrain from using primary_hostname
>
> And did you read the sentences before that one?

Indeed. It is worrisome. I'm at quite a loss as to troubleshooting it 
though. It seems that hostname -f doesn't use gethostbyname() or 
getipnodebyname() (at least as far as I can see from a strace). Are 
there other command line tools that I could use to test things?

Also, I've tried a few things, but I haven't been able to get exim to 
consistently send just the hostname without domain. I changed the line 
in 10_exim4-config_transport-macros to read just 
REMOTE_SMTP_HELO_DATA==$primary_hostname, but it seems to still return 
the fqdn as expected every time I try. I don't know what might change in 
those cases where it doesn't work.

Any suggestions are very welcome!
-- 
Jonathan Addleman - http://www.redowl.ca