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
Looks like Mitigation was applied, but it's possible that the /24 had some bad tenants previously? I don't know. But it does look like automatic Mitigation has in fact been applied, so ... that's all she wrote. We don't provide support thru MailOp, only via the Support webform, which it seems

[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

Re: [mailop] MailChimp and TLS

2018-12-10 Thread Ken O'Driscoll via mailop
On Mon, 2018-12-10 at 11:21 -0500, Matthew Grove wrote: > Hi Ken, > > We have a mix of older and newer server configurations. The older ones > can't handle TLS and maintain their current output, but we wanted to go > ahead with TLS where possible. We will be working to update all servers > and mak

Re: [mailop] MailChimp and TLS

2018-12-10 Thread Matthew Grove via mailop
Hi Ken, We have a mix of older and newer server configurations. The older ones can't handle TLS and maintain their current output, but we wanted to go ahead with TLS where possible. We will be working to update all servers and make TLS more consistent, but it'll take a little time. Cool, Matthew