SMTP, or Simple Mail Transfer Protocol, is a set of communication guidelines used by email servers to deliver emails to their clients. Your emails are just strings of text; SMTP helps servers and ...

I work for an ISP and occasionally deal with customers who swear up and down that they need *our* outgoing email server to make email that we do not host or provide work. Example: Customer has ...

Email: It's been around for decades, and people are still confused about how it works--and for good reason. Setting up and troubleshooting an email account can be an irritating venture. Recently, we ...

Thunderbird only (Windows/Mac/Linux): Experimental Thunderbird extension SendVia changes your outgoing SMTP mail server on the fly while composing a message. Using the extension is as simple as ...

Outgoing mail for Microsoft email programs is automatically routed through the Microsoft Exchange Server. It is possible to change this server to something else and to stop outgoing email from using ...

It appears many Mail users are having authentication problems in which they are prompted for the username and password every time a message is sent (either manually ...

My Exchange 2010 server has five IP addresses. I've got the second one configured as the mail server, and the SMTP receive connector listens only on that address. However, all outgoing SMTP is using ...