[MlMt] Disable IPv6 in MailMate

Zi Yan zi.yan at allmail.net
Wed Jul 3 15:17:23 EDT 2019

Hi Stijin,

Because it is the only workaround provided by my company. My company 
uses Exchange server, which provides IMAP service via 
outlook.office365.com. My guess is that outlook.office365.com has both 
IPv4 and IPv6 addresses, but my company internal Exchange server only 
has IPv4 addresses and IPv6 seems preferred over IPv4. As a result, when 
outlook.office365.com relays the email request to my company mail server 
via IPv6, no connection can be made, leading to errors.

Maybe a better solution would be a “prefer IPv4 over IPv6” setting?

Best Regards,
Yan Zi

On 3 Jul 2019, at 13:50, Stijn Jonker via mailmate wrote:

> Yan,
> Why would you want to disable this, if the service you are connecting 
> (IMAP of your company) doesn't support IPv6, it would (should) not 
> have an IPv6 address entry in DNS. So if Mailmate would lookup the IP 
> address for imap.example.com it would only get an IPv4 address and 
> connect only over IPv4 and not even attempt IPv6.
> Stijn
> On 3 Jul 2019, at 17:18, Zi Yan wrote:
>> Hi,
>> My new ISP provides native IPv6, which is great, but my company IMAP 
>> mail server does not support IPv6. I just wonder if there is a way of 
>> disabling IPv6 in Mailmate. It would be even better if I can disable 
>> IPv6 for a specific account.
>> Thanks.
>> --
>> Best Regards,
>> Yan Zi
> -- 
> Yours Sincerely / Met Vriendelijke groet,
> Stijn
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