{
  "is": "issue",
  "title": "US SMTP server blacklisted by Microsoft",
  "body": "\u003cp\u003e\u003cem\u003eFixed\u003c/em\u003e - We\u0026rsquo;ve verified that Microsoft is now accepting mail from the new US SMTP IP. \n  \u003cspan class=\"faded\"\u003e(16:42 UTC — Apr 7)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eWatching\u003c/em\u003e - The new US SMTP IP has been live for the past 12+ hours and we are seeing no problems with it.\u003c/p\u003e\n\u003cp\u003eAdditionally, Microsoft has finally responded to state that the original US SMTP IP has been delisted.\u003c/p\u003e\n\u003cp\u003eWe\u0026rsquo;ll continue to monitor until we\u0026rsquo;re satisfied that this is resolved. \n  \u003cspan class=\"faded\"\u003e(17:03 UTC — Apr 6)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eIdentified\u003c/em\u003e - Microsoft has continued to be unresponsive to our inquiries, leaving us no recourse except to move our US SMTP to a new IP address.\u003c/p\u003e\n\u003cp\u003eWe will begin the transition on Monday April 6 at 3AM UTC (2020-04-06 03:00 UTC).\u003c/p\u003e\n\u003cp\u003eWe anticipate that this transition will be minimally disruptive (if at all) and will not require any changes to customer mail client settings.\u003c/p\u003e\n\u003cp\u003eIf you notice any problems sending mail during or after the transition, please contact our support team for assistance. \n  \u003cspan class=\"faded\"\u003e(16:45 UTC — Apr 4)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eIdentified\u003c/em\u003e - Microsoft has been unresponsive to our inquiries for the past week so we\u0026rsquo;ve opened a new ticket with them.\u003c/p\u003e\n\u003cp\u003eAccording to Microsoft\u0026rsquo;s own postmaster tools the US SMTP is not blacklisted and no spam-like activity has been detected since 29 January 2020 - however, we\u0026rsquo;re still seeing bans for mail sent from the US SMTP to domains that use Office 365 email.\u003c/p\u003e\n\u003cp\u003eWe\u0026rsquo;ll continue to work with MS to get this resolved. In the meantime, customers affected by this issue can work around it by creating a new mail user on our Frankfurt, Germany mail server and using that user for their SMTP authentication for outgoing mail. \n  \u003cspan class=\"faded\"\u003e(21:28 UTC — Mar 16)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eWatching\u003c/em\u003e - \u003ca href=\"https://sender.office.com/\"\u003ehttps://sender.office.com/\u003c/a\u003e is reporting that our SMTP is no longer blocked but we\u0026rsquo;re still seeing intermittent bans in our mail logs. We\u0026rsquo;ve reached out to Microsoft for an update and are awaiting their response. \n  \u003cspan class=\"faded\"\u003e(17:29 UTC — Mar 12)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eInvestigating\u003c/em\u003e - This issue is ongoing. We\u0026rsquo;ll continue to work towards resolution. \n  \u003cspan class=\"faded\"\u003e(16:09 UTC — Feb 27)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eWatching\u003c/em\u003e - Microsoft has once again assured us that our US SMTP has been removed from their blacklist. We\u0026rsquo;ll continue to monitor. \n  \u003cspan class=\"faded\"\u003e(17:31 UTC — Feb 12)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eIdentified\u003c/em\u003e - We are still seeing ban activity In spite of the assurance from Microsoft that our US SMTP was removed from their blacklist. We\u0026rsquo;ll continue to work with them to get this resolved. \n  \u003cspan class=\"faded\"\u003e(15:13 UTC — Feb 6)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eWatching\u003c/em\u003e - Microsoft has delisted our US SMTP as of approximately 2:15 PM UTC 31 Jan 2020. It may take another couple of hours for the delisting to take full effect, so we will continue to monitor. \n  \u003cspan class=\"faded\"\u003e(15:43 UTC — Jan 31)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003e\u003cem\u003eInvestigating\u003c/em\u003e - This issue is ongoing. We\u0026rsquo;ve taken all of the required actions as dictated by Microsoft so far and are waiting for them to delist the server.\u003c/p\u003e\n\u003cp\u003eIn the meantime if you are a US customer affected by this block, feel free to use our German SMTP server to send mail: smtp.de.opalstack.com \n  \u003cspan class=\"faded\"\u003e(18:32 UTC — Jan 28)\u003c/span\u003e\n\n\u003c/p\u003e\n\u003cp\u003eOur US SMTP service is currently on Microsoft\u0026rsquo;s blacklist. Messages sent to email addresses that use Microsoft\u0026rsquo;s email services (including hotmail.com and outlook.com) may be bounced back to their original sender.\u003c/p\u003e\n\u003cp\u003eWe\u0026rsquo;re working with MS to have the server de-listed and will update this incident when it is done. \n  \u003cspan class=\"faded\"\u003e(14:15 UTC — Jan 24)\u003c/span\u003e\n\n\u003c/p\u003e\n",
  "createdAt": "2020-01-24 14:15:00 +0000 UTC",
  "lastMod": "2020-01-24 14:15:00 +0000 UTC",
  "permalink": "https://opalstackstatus.com/issues/2020-01-24-us-smtp-server-blacklisted-by-microsoft/",
  "severity": "down",
  "resolved": true,
  "informational": false,
  "resolvedAt": "2020-04-07 16:42:03",
  "affected": ["SMTP (DE)", "SMTP (USA)"],
  "filename": "2020-01-24-us-smtp-server-blacklisted-by-microsoft.md"
}