[Info-vax] SMTP server using port 587 outgoing?

[Stephen Hoffman]

On 2014-09-12 03:21:50 +0000, glen herrmannsfeldt said:

> snowshoe <no at spam.please> wrote:
> 
>> I haven't heard of no reverse DNS as being a spam setting for a  
>> destination email before.
> 
> For the source, not destination.

One of the smaller ISPs I was dealing with was filtering by destination 
DNS, based on empirical evidence.  Messages destined for a mail server 
with a bad DNS configuration were being (silently!) dropped.  Once DNS 
was corrected (and the TTLs expired on the cached data), the mail 
messages commenced arriving at the mail server.  (What mail server this 
ISP might have been using, I don't know.)


-- 
Pure Personal Opinion | HoffmanLabs LLC