Multitech RF500S Uživatelský manuál stáhnout pdf (Strana 36)

10.2 POP Mail

E-mail has a sending component, SMTP, and a mailbox part POP. When you compose and send e-mail

your mail program connects to the SMTP (Simple Mail Transport Protocol) mail server. The SMTP server

acts as a relay between your e-mail client and the Internet. The SMTP server verifies that each recipient is

accessible and returns an error message if not. Incoming mail is delivered to the POP server, (Post Office

Protocol) maintained by the ISP. It works much as a post office box. Mail is stored temporally until you

have a chance to retrieve it. The e-mail program connects to the POP sever and downloads the mail.

Normally the client tells the server to deletes mail once it is transferred but this can be overridden so mail

remains on the server. This is convenient if you access mail from more then one machine.

Security Tip -- Be careful opening e-mail attachments. This is the most common method of

spreading viruses and trojans.

Security Tip -- The aforementioned warning has been issued many times. What is less well known

is that simply reading e-mail can infect your system. ActiveX controls or VB scripting can be

embedded in the body of a mail messages. Reading the message activates the virus.

Security Tip -- Spam is a big problem. Many ISP’s restrict SMTP access to customers logged into

the service. This means if you have multiple ISPs or a domain hosting service you may not be able

to use a particular SMTP server. This causes trouble if you use difference ISP’s for example DSL

and dialup. This is discussed in the laptop and router automatic fail over section.

10.3 Corporate Mail

Telecommuters need to be able to access corporate mail from the SOHO LAN. Depending on where the

mail server is located this may prove to be difficult. If access to the mail server is not restricted the user

logs in like any other POP account.

If the mail server is not publicly accessible then you need to connect using the VPN client. In our case

connecting to the VPN requires additional authentication and is expired periodically to increase security

protection. This is not a problem when traveling and connecting for a short time but it gets tedious as a

telecommuter. Another option, if it is acceptable to your administrator, is to set up your corporate mail

account to automatically forward all incoming mail to a personal mail account. This allows you to access

your corporate mail without activating the VPN.

Mail Configuration Tip -- Archiving mail when using multiple clients gets pretty difficult. One of the

things I’ve found useful is to have your main computer remove mail from the POP server. The rest of

the machines retrieve a copy but do not delete the message. Then when you get back to the main

machine you can archive the received mail.

11 Fax – E-mail on Paper

Originally we did not want to use fax, preferring to interact with clients via e-mail or the telephone. We

found it is very difficult to get away from fax completely so we sought a solution that did not require a

“real” Fax machine.

For incoming fax we use the eFax.com fax service. Basic service is free; if you want a local or 800 number

they charge a monthly fee. Each customer is assigned a unique phone number in our case 520-223-4815.

When a fax comes in it is converted to a file and e-mailed to the subscriber. On the subscriber’s machine

special eFax software reads the attachment. The attachment can be saved and imported by other programs.

To send a fax we use Phone Tools that Dell bundles with its PCs. This allows direct faxing of electronic

documents or scanned hard copy.

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Multitech RF500S Uživatelský manuál Strana 36