Comment on Google Plus Deleting Accounts En Masse: No Clear AnswersparentComments−bhousel15yapt-get install postgreyThat's really all I do...−cageface15yAdmittedly it's been a few years since I did this. Maybe it's gotten easier.What about other mail servers rejecting mail originating from your server? I had a lot of trouble with that too.−protomyth15ymake sure you have a valid MX record and make sure the ip you get is not in a blocked segment in the major spam lists. You might need to do some work.
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apt-get install postgrey
That's really all I do...
Admittedly it's been a few years since I did this. Maybe it's gotten easier.
What about other mail servers rejecting mail originating from your server? I had a lot of trouble with that too.
make sure you have a valid MX record and make sure the ip you get is not in a blocked segment in the major spam lists. You might need to do some work.