Re: [mailop] Outlook/Hotmail/etc rejecting email (but not Office 365)

2018-12-11 Thread Michael Wise via mailop
e ; mailop@mailop.org Subject: Re: [mailop] Outlook/Hotmail/etc rejecting email (but not Office 365) On 11/12/2018 00:11, Michael Wise via mailop wrote: > Looks like Mitigation was applied, but it's possible that the /24 had some > bad tenants previously? I have a hunch it was alloca

Re: [mailop] Outlook/Hotmail/etc rejecting email (but not Office 365)

2018-12-11 Thread Benjamin BILLON
point, I let the "but why" go! * I believe that being on Microsoft's "block list" isn't necessarily about the blocked IPs we can see on SNDS -- Benjamin -Original Message- From: mailop On Behalf Of Chris Malton (Delta V) Sent: mardi 11 décembre 2018 08:42

Re: [mailop] Outlook/Hotmail/etc rejecting email (but not Office 365)

2018-12-10 Thread Chris Malton (Delta V)
On 11/12/2018 00:11, Michael Wise via mailop wrote: Looks like Mitigation was applied, but it's possible that the /24 had some bad tenants previously? I have a hunch it was allocated before, I'm just curious why it's been working for 2-3 months, and then suddenly stopped between Saturday night

Re: [mailop] Outlook/Hotmail/etc rejecting email (but not Office 365)

2018-12-10 Thread Michael Wise via mailop
, December 10, 2018 3:53 PM To: mailop@mailop.org Subject: [mailop] Outlook/Hotmail/etc rejecting email (but not Office 365) Hi all, I'm sure we've all seen this before (I'm fairly sure I have), but I can't for the life of me figure out what to do to fix it. The erro

[mailop] Outlook/Hotmail/etc rejecting email (but not Office 365)

2018-12-10 Thread Chris Malton (Delta V)
Hi all, I'm sure we've all seen this before (I'm fairly sure I have), but I can't for the life of me figure out what to do to fix it. The error in question: host eur.olc.protection.outlook.com[104.47.13.33] said: 550 5.7.1 Unfortunately, messages from [195.246.200.38] weren't sent. Please co