Rob, 

If you can receive his emails, how about replying to him. Not you creating a 
new email, but replying to one he has sent you.

Perhaps reply using your gmail account, then your iinet account.

Tim

Sent from Tim's Retina iPad 2

> On 4 Mar 2018, at 10:05 pm, Rob Phillips <[email protected]> wrote:
> 
> Hi Ronda
> 
> Sorry about the delay - life has interceded.
> 
> I use Thunderbird, but I get no message about inability to deliver.
> 
> I looked at the 'all headers' info, and it didn't tell me much...
> <hihohgbfepdoffkm.png>
> 
> Still a mystery...
> Rob
> 
>> On 2/3/18 12:12 pm, Ronda Brown wrote:
>> Hi Rob, 
>> You mentioned “we tried a direct, person-to-person email, and this also 
>> failed.”
>> Did you send this email using Apple Mail, if so did you receive any error 
>> message as to ‘why your message could not be delivered to his address?’
>> Or look in you sent mailbox. Locate the sent message - Go to View > Message 
>> > All Headers. It perhaps could give you some hint.
>> 
>> You might find some help through Mailman Users group.
>> https://www.mail-archive.com/[email protected]/
>> 
>> https://mail.python.org/pipermail/mailman-users/2017-July/082315.html
>> 
>> Cheers,
>> Ronni
>> 
>>  Ronni Brown’s iPad Pro 12.9-inch 256GB 
>> 
>> 
>> On 2 Mar 2018, at 9:02 am, Tim Law <[email protected]> wrote:
>> 
>>> Has he sent an email to your gmail account so that you are sure you have 
>>> his right email address. I realise you’ve had success using a different 
>>> send account, but not knowing all the details, I’m just wondering
>>> 
>>> Can you get someone else you know with a gmail account to send him a message
>>> 
>>> Sent from Tim's iPhone
>>> 
>>>>> On 2 Mar 2018, at 8:55 am, Rob Phillips <[email protected]> wrote:
>>>> 
>>>> Initially, they were group emails sent through Mailman (and I checked the 
>>>> settings). Once it was clear that this failed, we tried a direct, 
>>>> person-to-person email, and this                     also failed.
>>>> 
>>>> I don't think I've BCCed him at all.
>>>> 
>>>> Thinking about it, the person with the admin rights to the Mailman account 
>>>> is no longer with the organisation, so I haven't seen any bounce messages 
>>>> from Mailman. These might give a clue as to the problem.
>>>> 
>>>> Any bright ideas?
>>>> Rob
>>>> 
>>>>> On 2/3/18 5:45 am, Ronda Brown wrote:
>>>>> Hi Rob,
>>>>> 
>>>>> Are these group emails... bcc‘d? Or emails sent to only one recipient?
>>>>> 
>>>>>  Ronni Brown’s iPad Pro 12.9-inch 256GB
>>>>> 
>>>>> 
>>>>>> On 1 Mar 2018, at 10:25 pm, Rob Phillips <[email protected]> wrote:
>>>>>> 
>>>>>> Greetings
>>>>>> 
>>>>>> This is a quite obscure problem, and not directly related to Macs. I'll 
>>>>>> understand if there is no response... :-)
>>>>>> 
>>>>>> I have a gmail email account, which works fine (for most people). There 
>>>>>> is one person (a Windows user) who never receives my Gmail emails. 
>>>>>> Everybody else does!
>>>>>> 
>>>>>> I have told him repeatedly that the problem must be at his end. He has 
>>>>>> made sure that this email address isn't in his junk or blocked list.
>>>>>> 
>>>>>> He says that he has reviewed all the email security settings on his 
>>>>>> computer.
>>>>>> 
>>>>>>> Re emails - your iinet ones are getting through to me; it's the gmails 
>>>>>>> that don't even though it's on my safer senders list and not on the 
>>>>>>> blocked one. Can't seem to get around this one but have changed the 
>>>>>>> last possible security setting.
>>>>>> I'm just wondering if there's some setting on Gmail which might restrict 
>>>>>> my messages going to him.
>>>>>> 
>>>>>> If nobody knows, which is a good forum to ask?
>>>>>> 
>>>>>> Cheers
>>>>>> 
>>>>>> Rob
>>>>>> 
>>>>> -- 
>> 
>> 
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