How to send an email from a nonexistent (auto-generated unique identifier) ​​email?

Question

I am the owner of the domain, and currently I have its mail (MX) in Google Apps for Business.

I have a general account, so if someone answers an e-mail to the generated [e-mail] , I have a robot that will read this letter and do some processing.

Problem: how can I send an email from this sender address? I mean: I can’t create a user ID for each generated ID, and if I authenticate with Google SMTP with some user, the sender will be automatically filled in as this user address. (I know that I can use any "verified aliases" as the sender (or respond to), but I also cannot create an alias for each generated identifier.)

In short: I need to send emails from a nonexistent email address. How to do this using third-party existing services (I do not want to host my own SMTP server if there is no simpler solution).

Are there hosted mail servers that let me do this?

PS: As you can guess, this is a ticket-like system that must generate a unique email address for each stream . (Yes, I know that I could use Subject for a unique identifier. Is this the best solution?)

Answer 1

Gmail allows you to use the local part of the email address subaddress as ad-hoc alias , for example

[e-mail]

will be redirected to [e-mail] and you can use the local part / alias for filtering.

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Answer 2

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