Cannot Send Email While Traveling

Scenario: You are a business person traveling aroundISP network. Since you are already in that network,
the world. You just got to your hotel room, turnedyou will not have problems to use your ISP's SMTP
on your laptop pc and are ready to answer to thoseserver. But when you are in that hotel room you
very important emails that arrived while you were onmay have problems doing it, since you might be
the plane. So, you open your Outlook, Thunderbird orconnecting from a different ISP network. So, it is
whatever email client you have, and start answeringpretty normal that you cannot send emails from a
first the most important messages. Once you finish,different location
you click on the "Send" button, totally confident andSo, What Can You Do About That Relaying Denied
relieved because you needed that mail sent withError?
extreme urgence. Oh no... what happened? YouThere are many things to do. You could check if it is
received one of this errors: smtp 550 error Unable topossible to enable the authentication when connecting
relay to user relaying denied mailbox unavailable or isto that SMTP server, so you can tell him "I am not a
not local Server Error: 550 Error Number:spammer" and be able to send emails wherever you
0x800CCC79 553 sorry, that domain isn't in my list ofwant. You could also use web mail, but I am sure it is
allowed rcpthosts Server Error: 553 Error Number:not the same, when you have all your emails well
0x800CCC79organized in your Outlook folders.
Why does this happen only when you are traveling?Going back to our scenario, maybe it is 1 am and you
Most Internet providers use two protocols to sendcannot contact anyone to check about the SMTP
and receive mails: SMTP and POP. SMTP (or Simpleauthentication or webmail. Is there another option? A
Mail Transfer Protocol) is the one used to send emailvery valid solution to your email sending problems is:
out. When you are home, you are connected to yoursmtp2go.