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SMTP missing command: VRFY #991

Description

@fopina

Interactsh version:

1.2.2

Current Behavior:

Email sending aborted, nothing logged on server

Expected Behavior:

Allow email to be received and logged.
Or at least log something

Steps To Reproduce:

curl smtp://zulrcfumxeffqqzqvsam2ar10skqbycpn.oast.fun --mail-from a@a.com --mail-rcpt b@zulrcfumxeffqqzqvsam2ar10skqbycpn.oast.fun -d ehlo -vv
* Host zulrcfumxeffqqzqvsam2ar10skqbycpn.oast.fun:25 was resolved.
* IPv6: (none)
* IPv4: 206.189.156.69
*   Trying 206.189.156.69:25...
* Connected to zulrcfumxeffqqzqvsam2ar10skqbycpn.oast.fun (206.189.156.69) port 25
< 220 oast.fun interactsh ESMTP Service ready
> EHLO skMac2-5
< 250-oast.fun greets skMac2-5
< 250-SIZE 0
< 250-AUTH CRAM-MD5
< 250 ENHANCEDSTATUSCODES
> VRFY b@zulrcfumxeffqqzqvsam2ar10skqbycpn.oast.fun
< 502 5.5.1 Command not implemented
* Command failed: 502
> QUIT
< 221 2.0.0 oast.fun interactsh ESMTP Service closing transmission channel
* Closing connection

VRFY command fails and email is not processed (as no data is issued by client)

Anything else:

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