Microsoft is rolling out inbound SMTP DANE with DNSSEC for Exchange Online in public preview, a new capability to boost email integrity and security. As the Exchange team explained on Wednesday, ...

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.

Having a full Inbox when you log onto your e-mail in the morning used to give you that warm feeling that comes from knowing that your friends and colleagues want to know how you’re doing and seek your ...

We have people that travel and I've been annoyed a lot with some hotels using ISPs that block SMTP port 25 traffic. The solution is having to talk the users through changing the default SMTP server ...