Hello Nemo.
I think it has nothing to do with email client.
Have first make the shop presta 1.6.0.9 in "domain.es" and, when everything worked ok, in steed of translated it i make the whole shop new again with presta 1.6.0.11 in
"domain.com".
Domain.es works perfect domain.com do not resolve correctly the mails.
Both are at the same hosting server with the same email. client.
Think that I will not lose more time, or your time and let the shop with "domain.es" and redirect. the .com.
Thanks in each case for your time.
Kind regards.
jomi