In what context does this matter? It is perhaps not as important for email senders, but for those running spam filters and blocklists, either standalone or in the context of a mailbox provider, many folks often create and cache mailbox provider-specific allowlists for various reasons; sometimes to exempt large domains from certain types of blocking. Meaning, a list of all of Yahoo's sending IP addresses might be useful for somebody looking to special case mail from Yahoo Mail. It's something I did myself back when running a blocklist, not wanting to needlessly trigger listings of large, shared infrastructure in use by one of the top webmail providers.
Wondering what domains Yahoo Mail hosts email inboxes for? I’ve got a list of most of them here.
Yahoo has added new, additional sending IP addresses for their outbound email, as they recently announced on the Mailop list and elsewhere.
Head on over to the “Outbound Mail Servers” page on the Yahoo Sender Hub, or pick apart their SPF record, to find the most up-to-date list of their sending IP ranges.
In what context does this matter? It is perhaps not as important for email senders, but for those running spam filters and blocklists, either standalone or in the context of a mailbox provider, many folks often create and cache mailbox provider-specific allowlists for various reasons; sometimes to exempt large domains from certain types of blocking. Meaning, a list of all of Yahoo's sending IP addresses might be useful for somebody looking to special case mail from Yahoo Mail. It's something I did myself back when running a blocklist, not wanting to needlessly trigger listings of large, shared infrastructure in use by one of the top webmail providers.
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