Help! I'm blocked at! (Updated for 2024)

Hey! Are you finding your mail rejected when trying to send to

Through a complicated series of mergers and acquisitions over the years, AOL and Yahoo and Verizon have all merged into a single MBP (mailbox provider). The surviving entity? Yahoo! Mail.

Thus, if you're blocked when sending mail to users, you're actually being blocked by Yahoo! Mail. Yahoo's got a whole Sender help website here, and you can find my AOL/Yahoo deliverability guide here.

Updated April 7, 2024.
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