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Closed 2 years ago.
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According to MXToolbox my server has a problem.
Please review:
https://mxtoolbox.com/SuperTool.aspx?action=smtp%3awebmaus.net&run=toolpage
The tool shows a 'SMTP Reverse DNS Mismatch' and I don't have an idea why.
My PTR Records look like:
158.22.202.116.in-addr.arpa. 86400 IN PTR 158.22.202.116.pleiades.webmaus.net.
I've also got A/AAAA records added for pleiades. Any hints on where the problem could be?
Reverse DNS: closed PTR-A loop
SMTP servers check "closed loop" of PTR and A records.
IP address -> [ PTR record ] -> Name -> [ A record ] -> IP address
Rogue nets can set PTR to any name they like.
There seems to be no A record for 158.22.202.116.pleiades.webmaus.net.
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I have a working SMTP setup in Postfix
transport_maps = hash:/etc/postfix/transport
smtp_sasl_auth_enable = yes
smtp_sasl_password_maps = hash:/etc/postfix/sasl_passwd
All is good with the SMTP, however now Postfix ignores the header_checks
header_checks = pcre:/etc/postfix/header_checks
or
smtp_header_checks = pcre:/etc/postfix/header_checks
Is there a priority of operations, like "use transport and stop"?
If yes, what could be a way to apply header_checks before transport?
Thank you!
I am not 100% sure why, but when I changed transport map from *:
* relay:[THE_SMTP_HOST]:587
to
specific_email#domain.tld relay:[THE_SMTP_HOST]:587
another_email#domain.tld relay:[THE_SMTP_HOST]:587
the header_checks started working.
(I tried .domain.tld - SMTP stopped working at all)
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Closed 5 years ago.
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What do the following process states mean in AWS Aurora (MYSQL-Compatible)
delayed send ok done
delayed commit ok done
Noticing many sleeping processes with the above state. These seem to Aurora-specific.
Are these states any indicators of underlying performance issues with my queries or Tables?
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Closed 6 years ago.
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I have installed MySQL on mac, and was given a default password. Upon starting the server and entering the password, the error below appears:
How can I check the port mysql is running on?
That is an extremely stupid dialog box. It is obvious from the text of the error message that the server is running at the correct port. Your problem is the username, the password, or the access level granted to that user.
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Closed 6 years ago.
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PAT is also called overloading NAT. I don't understand why we need to use PAT? NAT alone is handling IPv4 addresses then why it is required to translate port also?Today's home wifi router use both NAT and PAT simultaneously which is also called NPAT. Your network will still work without PAT also then why PAT is used?
NAT: Network Address Translation; PAT: Port Address Translation
Network Address Translation (NAT) and Port Address Translation (PAT) both map IP addresses on an internal network to IP addresses on an external network. Which method of address translation you use depends on the types of networks that you are translating and the number of available IP addresses that you have.
Please see.
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Closed 8 years ago.
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I am free user in Openshift. There are 3 machine available.
I used 1 to write my blog.
About 1 hr ago. I just want to delete another machine, so I click button "delete".
And than, I found that I delete the wrong one.
So my blog is killed by me....
How can I receive my data ??
My blog is blog-whycat.rhcloud.com
Let me quote the delete confirmation page:
This will delete all the code and data associated with the app, and
cannot be undone.
If you really don't have any backups, your best bet would be to contact the support.