Is there any particular reason why I should not perform SPF checks for outgoing mails?
I was reading on some articles that "you should not perform SPF checks for outgoing mails", why?
I'm doing SPF checks for incoming mails and it saves me from lot of spam, but sometimes I get some spam sent from my shared hosting servers, could be outgoing SPF checks valid to block some spam?
Hello;
An account at our host sends spam permanently. There is a block system via time like a user can send 100 mail in an hour. So this spam spents sending rights in a hour and the real users cannot send because of the block system.
How can i block this outgoing spam mails?
which tool (script, nagios plugin, whatever) can I use to monitor tge rate of outgoing mails on a postfix mail server? I would like that script to calculate the number of outgoing mails per minute or every ten minutes or so and alert me by e-mail if that rate exceeds a predefined number, thus detecting possible spam waves.
Configure An Email Gateway With Scrollout F1 Anti-Spam & DLP
An email gateway (a.k.a. firewall) is a machine (physical or virtual)
installed between Internet and the email server. Its primary role is to
protect the email server by filtering incoming messages, via SMTP
protocol, from Internet.
My web-app tracks various online services and to do so, makes frequent outgoing TCP and UDP requests (through PHP).
Unfortunately, my web-app was recently hit by a DDoS attack. To counter it, I installed a proxy for incoming requests (CloudFlare) and this seems to work well.
I had situation in past when one of my domain POP3/SMTP user/pass compromised.
And someone connect to our server (SMTP) with that user account to send bulk of emails.
I need to eliminate this sort of spam mechanism like in case if account compromised no one can send emails to others by using that user email address.
I have quite some users on my domain which acts as POP3 and SMTP also.
Is it possible to configure one Mailbox in Exchange 2010 to encrypt the outgoing mails with PGP?
I have the following configuration:
1) External/Public SMTP-Relay (of course relay only for our domains) where all external Mail is sent to and forwarded to the public IP onsite and is also used as a smarthost for outgoing mail.
Hello, we´re looking to implement an external smtp relay to forward all our outgoing traffic from our cpanel servers.
We need to implement antispam filter in the relay server, we´re are thinking in a solution that detect spam with spamassasin and according to the score relay it, delete it or store it in a review folder for future approval o deletion.
Anyone has done something like this ?
I have been developing a PHP application and one of the features in that application is the ability to send e-mails to users. However, when I tried to send e-mails via application (SMTP) to Gmail and Hotmail accounts, they always go to Spam/Junk box. This doesn't happen when I use Google SMTP for sending them.
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