MailChannels sends from a large number of IP addresses and the list of IP addresses from which we send changes from time to time. Fortunately, the list is always available in our SPF records and you can look up the list easily with online...
Overview The terms SSL, TLS, and STARTTLS are often used in relation to securing a connection, but not everyone knows what these mean. This article should help provide some basic information about each term. SSL SSL stands for “Secure S...
If you’re receiving this error, it means we have detected abuse originating from your email account. The 550 5.7.1 [SS] error indicates that the subject line in this/these message(s) contained one or multiple spam-like keywords commonly u...
