Some Outlook users have reported that they are unable to send email from the app as when doing the same, they receive Error 503 stating that the Valid RCPT command ...

Verizon is one of the many Internet Service Providers that require you to authenticate when sending mail. The purpose of SMTP authentication is to reduce email spamming and abusive mailing behaviors.

This weekend, we set up SMTP authentication on the work email server. Windows client can connect just fine (enabling SMTP authentication in Outlook or Outlook Express lets the PC user send mail ...

Anyone have anything that would enable SMTP authentication for outgoing mail on Outlook 2002 (that's the version in Office XP, right?) and 2003? I need some way to script this so that all of our ...

Microsoft now enables the use of its Outlook e-mail client applications for Android or iOS devices with some Exchange Server products in so-called "hybrid modern authentication" scenarios, according ...