Can Another MailOnce Domain Work When One Is Rejected?
Another available domain may be treated differently by a site, but acceptance is never guaranteed.
Quick answer
Another available domain may be treated differently by a site, but acceptance is never guaranteed.
Different data can produce a different decision
Another MailOnce domain can receive a different decision because websites do not all use identical lists or reputation data. That possibility is not a guarantee and should not be presented as a way to bypass a service's requirements.
A website decides whether it will accept an address in its own form. Mail delivery begins only after a sender actually sends a message to that address, so the two outcomes should not be treated as the same test.
Separate website policy from mail delivery
MailOnce can provide another available domain when the product supports multiple domains, but that is an alternative address choice rather than a promise to defeat a website rule. If a service requires a stable or non-disposable address, respect that requirement.
Another available domain may be treated differently by a site, but acceptance is never guaranteed.
Another domain can change the policy result
Diagnose the layer first: website acceptance, address choice and message delivery are related, but they are not interchangeable. Another available domain may be treated differently by a site, but acceptance is never guaranteed.
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