Support - No-IP Support Center
Alternate-port SMTP FAQ 
- Activei a Porta SMTP Alternada, como devem estar as minhas configurações?
- Estou a receber o erro, "553 sorry, that domain isn't in my list of allowed rcpthosts (#5.7.1)" ao tentar enviar na porta alternativa 3325. O que é que está mal?
- Como é que configuro o meu servidor de correio para utilizar a Porta SMTP Alternada com autenticação?
- E sobre SPF com a Porta SMTP Alternada?
- O No-IP fornece transferência de correio encriptado (SSL)?
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