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A bounce address is an email address to which bounce messages are delivered. There are many variants of the name, none of them used universally, including return path, reverse path, envelope from, envelope sender, MAIL FROM, 5321-FROM, return address, From_, Errors-to, etc. It is not uncommon for a single document to use several of these names.
In computing, Bounce Address Tag Validation (BATV) is a method, defined in an Internet Draft, for determining whether the bounce address specified in an E-mail message is valid. It is designed to reject backscatter , that is, bounce messages to forged return addresses.
If an email with MAIL FROM:<> is sent to non-BATV-tagged email address, it's rejected, of course, because only BATV-tagged emails are supposed to be receiving emails with NULL sender. If it was meant that the system using this BATV-feature somehow barfed and does not generate BATV-tags in the envelope sender, but instead generates NULL sender ...
The most common reason for a failed delivery is that the email address entered isn't valid. If the delivery failure message says the account doesn't exist double check the spelling of the address you entered. A single misplaced letter could cause a delivery failure.
The article "Google Earth Engine" provides a fairly concise description of from where, and for what, the engine was created. As a whole, the article is a good description of the purpose and the history, and compared to the previous pages, the content level has greatly increased.
When a message is sent to a mailing list, the mailing list software re-sends it to all of the addresses on the list. The presence of invalid addresses in the list results in bounce messages being sent to the owner of the list. If the mailing list is small, the owner can read the bounce messages and manually remove the invalid addresses from the ...
As a workaround, it is possible to synthesize a temporary bounce address on the fly that will direct any bounce back to the current MTA. The scheme provides a way to recover the original envelope address so that if a bounce does arrive, it can be forwarded along the reverse path, but this time with an empty envelope sender.
Google has updated it's aerial maps of Ukraine for the first time since the start of Russia's attack - with images now revealing the full scale of devastation. The contrast is stark in Mariupol.