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It is very natural for a busy person like you to exude annoyance at the failure of mail delivery. For a net savvy person, an email is an important tool to communicate with the others provided they have email addresses. You are using HotSpot to send mails but every time an error message is being generated. I admit, it is a frustrating experience. But do not fret; I assure you there is an easy solution to fix the problem. Due to the widespread threat of the spam problem, some ISPs do not allow their clients to send mails using their email server SMTP in case the users do not reside on their network. You are not a member of their network and this is the reason why you have tested failure in sending the messages.
To cure the problem, some HotSpot providers have their own email server SMTP that can be used by the clients to send mails. But you must change your email account setting in order to access this facility. Your email server SMTP is a bulwark against the span invasion. The majority of the servers is capable of preventing the unauthorized relaying or implements some effective checking system to stave the spams. You are allowed to use the Mail Abuse Prevention System (MAPS) or any other similar system to make and maintain a black list of the known spammers. In case, you are using the SMTP security server, the SMTP resources must have a clear definition of the sender as well as recipient.
The users are not often sure whether their email server SMTP is a right tool to filter out the spams. These spams create the real troubles and block the message delivery. Many companies have attempted to sweep this nuisance out. Fortunately, Firewall-1 has some useful features such as SMTP security server to get rid of this trouble.
An email may be of a variety of size. Due to the attachment of text files and visuals, the size of a mail may increase significantly. Now the question is if the SMTP security server is able to handle any mail irrespective of its size. Remember that while being transmitted over an email server SMTP, the messages are encoded into a six-bit format and as a result, expand in size by 33%. It means if you are sending a big file, it will be of enormous size after encoding. In that case, you should use firewall to get the file accepted. ‘Connection to final MTA failed’ – if this message flashes on the screen, it means the SMTP security server has been unable to build up a connection with your email server SMTP. The message mirrors the failed mail delivery. The problem may be temporary in nature or the remote SMTP server has no existence. If you want to send mails from any HotSpot, you have to use SMTP relay services. This way you can send mails though your HotSpot does not own any server but you have to pay for that.