More invalid emails... frustrating

Toni from Spain is becoming quite upset and complains
about the lack of response. In fact he has a problem with
e-mail...

Hi. This is the qmail-send program at relay03.pair.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<toni@mail.montia.net>:
213.97.27.216 does not like recipient.
Remote host said: 550 not local host dns1.montia.net, not a gateway
Giving up on 213.97.27.216.

Andrea is offering to translate our website to Spanish.
But Andrea does not have a working e-mail address.
Too bad, her offer was really interesting:

Hi. This is the qmail-send program at relay.pair.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<andreag@agptraducciones.com>:
Connected to 62.151.8.50 but greeting failed.
Remote host said: 554 SMTP service not available
I'm not going to try again; this message has been in the queue too long.

There's more of this:
Hi. This is the qmail-send program at relay02.pair.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<ctvmayco@yahoo.com>:
67.28.113.19 failed after I sent the message.
Remote host said: 554 delivery error: dd This user doesn't have a yahoo.com account (ctvmayco@yahoo.com) [-5] - mta213.mail.re2.yahoo.com

Hi. This is the qmail-send program at relay.pair.com.
I'm afraid I wasn't able to deliver your message to the following addresses.
This is a permanent error; I've given up. Sorry it didn't work out.
<cordillerainteractiva@hotmail.com]>:
Sorry, I couldn't find any host named hotmail.com]. (#5.1.2)

Mark