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Posts Tagged ‘port 25’

Having Problems Sending Email Because Your ISP is Blacklisted?

Wednesday, October 9th, 2013

It happens over and over — users trying to send legitimate email messages are blocked from sending because the IP address that they are getting from their Internet Service Provider (ISP) for their personal computer (or small office) is on some major blacklist, like SpamHaus.  Comcast, for example, has been the focus of many of these issues. This message blocking often happens even if a user is sending outbound email through a legitimate email provider like LuxSci.

Users invariably ask:

  • Why is the mail blocked even though I am sending through LuxSci or some other email provider and not directly from my ISP?
  • What can I do about it?

Fortunately, there is a good reason why the blocks occur and an easy solution to them … anonymous SMTP service to hide your IP address.

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Tags: alternate port, anonymous, blacklist, block, blocked, comcast, ip address, isp, port, port 25, private smtp, received, sending email, smtp, spam, spamhaus
Posted in Business Solutions, LuxSci Library: The Technical Side of Email
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How to send unlimited email to someone for free and without authentication or SSL

Friday, September 14th, 2012

We field questions daily from customers who need to configure some special software or piece of equipment to send them email, but can’t because their SMTP logins require authentication (e.g. a username and password), or their software/hardware cannot be configured to connect to specific SMTP ports, or maybe because their logins require SSL/TLS for transmission security but their device doesn’t support that (and isn’t sending anything sensitive anyway).

Of course, software can be updated; there are always newer or more expensive devices that have more robust email sending capabilities.  However, additional time and/or cost is rarely the ideal solution. If the program/device will not be sending sensitive data and the email stream does not require end-to-end protection (e.g. for HIPAA compliance), then there is a very easy work around to get the device to send your mail.

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Tags: authentication, dns, email delivery, hipaa, login, port 25, smtp, tls
Posted in Business Solutions, Email Marketing
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