@sreeharis seems like the problem is - Invalid DNS and reverse DNS lookup - No properly DMARC is configure in DNS/domain provider have you ...

Same problem and already resolved. Mine, As root> 1. apt upgrade python 2. apt-get install python3-pip 3. apt install clamav 4.freshcla...

@rony Hi, Thanks for sharing, for my case the problem is invalid reverse dns record from ISP so some destination domain was rejected email from my ...

Thanks @arman, Unable to find the guideline for changing/customizing logo, can you assist or provide the sample.

@shariful-islam Thank you, I've done the installation, problem is the dns configuration and invalid DNS + PTR. But I cannot find the S...

@frankzop Check your configuration in mxtoolbox.com for mx lookup, spf lookup and reverse dns (PTR, sending to gmail is required). What is your d...

@shariful-islam Thanks Islam, Can you assist me How to create/config SPF, DKIM and DMARC record, I'm using No-IP as Domain/DNS provider (Using Stat...

Hi, I'm now able to send email to some domain except send email to @gmail.com

@shariful-islam please find the log, Thank you. zextras@mail:~$ grep 8C43616146B /var/log/carbonio.logJun 2 09:05:36 mail postfix/dkimmilter/smt...

@shariful-islam Another try. zextras@mail:~$ tail -f /var/log/carbonio.logJun 2 09:30:39 mail zmconfigd[21083]: All configs fetched in 0.06 secondsJ...

@shariful-islam Here is the log ======================================= Jun 2 09:03:44 mail zmconfigd[21083]: Command not defined for directory-s...