On 1 Sep 2017, at 8:04, Angelina via mailop wrote:
We're seeing it on our end as well as another ESP off list.
On Fri, Sep 1, 2017 at 8:18 AM, Alexander Burch
<[email protected]>
wrote:
Anyone else seeing issue with hotmail.co.uk bouncing messages with
this
code:
"550 Requested action not taken: mailbox unavailable,"
That's usually reserved for invalid email addresses, but they are
bouncing
100% of the messages we send them on on of our IP ranges with that
code.
Just started this morning.
If this is being caused by a change in the MX records for hotmail.co.uk,
you might need to change your rules.
This kind of issue affects mail senders that configure rules to
distribute messages to mail queues based on the bare domain in the email
address. It also misses domains with outsourced email, which are sent
using the default queueing policy set by your MTAs.
If you excuse the plug, a new service available in beta at SuretyMail
solves this automatically by sorting outgoing email into the right queue
every time, all the time. Drop a line off-list if interested in
participating in the closed test -- I believe there are a few spots
available.
Best regards
-lem
Luis Muñoz
Senior Tech and Deliverability Analyst
SuretyMail Email Reputation Certification & Inbox Delivery Assistance
[email protected]
www.ISIPP.com
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