Forum Discussion
Vitaliy_Savrans
Nacreous
Useful link for checking DNS configuration for mailgateways http://mxtoolbox.com (maybe this simple test will answer to your question). For avoiding be in spam lists don't forget about SMTP Reverse Banner Check.
boricuaking55_1
Feb 14, 2014Nimbostratus
Thank you sir - that's actually been one of the tools I've been using while working on this and I highly recommend it.