Postal: Gmail spam problem

[Ishma59]

everything is set and i'm able to send mail from my postal server......thanks to the community for the help
the only problem i'm having is when i send mail to mails such as yahoo from postal they are okay but when i send to gmail they are flaged as spam emails.....i just cant understand any help please

[16n]

GMail has very restrictive SPAM "filters" and rules. For example, when using an IP that is "unknown" to GMail to send E-Mails, they are often flagged as SPAM. Also, there is pretty restrictive rate limiting for unknown IP.
The second reason could be that maybe the IP you are using is on a blacklist because a previous owner sent SPAM with it and got reported.

[Ishma59]

but the main problem is that when i use the postal interface to send mail l to @gmail.com it is flagged as spam but when i configure thunderbird to send mail through my postal server its not flagged as spam by gmail......

[Ishma59]

and the problem with the thunderbird -- postal server connection is connection keeps timing out

[willpower232]

Try sending one of your emails to https://www.mail-tester.com/ and see what they say.

[Ishma59]

Click here to view your message
-1.6
SpamAssassin thinks you can improve
-4
You're not fully authenticated
Your message could be improved
-0.5
You're listed in 1 blacklist
from mail tester.com i think the black list is the problem

[willpower232]

The black list definitely will be a contributor but "you're not fully authenticated" implies there might be a problem with your DKIM and/or SPF records as well.

[masihfathi]

An Experimental Case in Gmail
Start with low send and gradually increase. After almost a month, your email will be inbox,
Sending with new IPs, take about a month to be inbox and you should wait.
Of course, I suggest register your IPs and domains in
https://postmaster.google.com/