miércoles 08 septiembre 2021 :: 1049hrs (UTC +01:00)
You have 2 options adding to the Blacklist in eMC.
1./ You can enter a domain or an address manually Menu ->Rules ->Blacklist (any subsequent emails will be sent to Junk)
2./ You can ‘Move to Junk’ a received email, this action will add the address to your Blacklist
There are other features if you are using Exchange or Office 365 when server side rules can apply, however, there are restrictions regarding the limitations of the providers’ APIs (probably not important for most as it can get a bit complicated)
As far as I am aware you cannot create a rule in eMC to say a message was undelivered, however, if you are a Gmail user you could use their auto reply, though in my opinion not advisable. It is possible in some SPAM blockers where blacklisted items can be bounced. Also there are differences of opinion concerning this, some say it is better to do nothing, others say it is a good idea. Personally, do nothing as a bounce indicates that there is something that reacted.
¡Saludos desde la soleada Valencia en España!
¡Mis mejores deseos y mantente a salvo!
Hablo principalmente español, portugués e inglés, también un conocimiento práctico de varios otros.