Verifying NetEase 126 addresses

• Foreign probe connections are dropped or refused in the same pattern as 163.com.
• The two domains share infrastructure and rate-limiting policy, so probing both changes nothing.
• Responses follow standard conventions on the rare occasions a connection completes.
• 126.com tends to hold slightly newer accounts than 163.com, which came first.

• The same Chinese regulatory considerations apply as for any mainland recipient.
• 126.com appears on B2B and trade data alongside 163.com for the same reason.
• Segment mainland Chinese addresses out of coverage expectations built on Western lists.

Shared servers don't mean shared mailboxes at NetEase. The company registers 163.com and 126.com addresses separately, so li.wei@163.com and li.wei@126.com can belong to two people who've never met. Say you're merging a trade-show list with a directory export, 900 NetEase rows in total, and your dedupe step keys on the local part because it's all one provider. Every collision it finds is a coin toss, and each wrong merge attaches one person's name and order history to another person's inbox.

Dedupe on the full address for these domains. Group by provider for pacing and reporting, where the shared infrastructure does matter, and keep identity matching strict. The two jobs use the same word, provider, and need opposite rules. If your CRM has already merged NetEase rows this way, pull the merge log and split them again before the next send, since the damage compounds each time someone updates the wrong record.

Here's the arithmetic on a list where a third of the rows can't be checked. Say you upload 30,000 addresses and 10,000 of them are on 126.com and 163.com. From outside China those 10,000 will mostly come back unknown. Unknowns aren't billed, so the run consumes roughly 20,000 credits. At our pay-as-you-go rate 10,000 credits cost $25, and whatever you don't use stays on the account, because credits never expire.

Compare that with a tool that bills every row submitted. You'd pay for 10,000 results that carry no information, and you'd likely get them labeled with something more confident than unknown to make the invoice feel fair. When you compare quotes, ask each vendor two things: what they charge for a row they couldn't resolve, and what label that row gets. For a China-heavy list those two answers matter more than the per-email price.