Sending to the list

Doug Hardie doug at
Sun Feb 5 21:12:22 UTC 2017

> On 5 February 2017, at 10:51, Matthew Seaman <matthew at> wrote:
> On 05/02/2017 17:52, Doug Hardie wrote:
>> I have been having to go through a special process to send to any of
>> the FreeBSD lists. Otherwise, the servers reject my emails with:
>> 6F637114C308     3078 Sun Feb  5 11:03:33  doug at
>> (host[] said: 450 4.7.1 <mail.localdomain>: Helo command rejected: Host not found (in reply to RCPT TO command))
>>                                         freebsd-questions at
>> Searching Google finds that it appears the mail server is not liking
>> the reverse DNS entry which was a valid complaint.  It took awhile to
>> get that resolved as the transfer from Verizon FIOS to Frontier was
>> not exactly transparent.  However, that is now corrected and I still
>> get the same response.  How do I find out what the problem is?  I
>> suspect this is not the right list, but I couldn't see any other that
>> might be more appropriate.
> Your mail server is identifying itself as 'mail.localdomain' during the
> EHLO or HELO step of the SMTP transaction.  That's what the FreeBSD mail
> servers are objecting to since they can't look up an IP number for
> 'mail.localdomain' and then check that IP number reverses to the same name.
> Check the configuration of your MTA.  You want to make it call itself
> '' when it introduces itself to the MTA it's sending
> to.  How to do that depends on what MTA software you're using, but in
> sendmail(8), it's the $j macro that needs to be set appropriately.
> Something like
>   define(`confHELO_NAME', `')dnl
> in your file.
> 	Cheers,
> 	Matthew

Server is postfix and I believe I have corrected that now.  Thanks.

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