EnglishWhen I am using OVH Cloud, I can send and receive mail. But when I switched to another VPS (Clean installation), it did not work anymore, I could still receive mails but not send them and yes I have checked my spam folder and searched up the sender in the recipient.
All ports are open,
rDNS is working (mail.c-core.xyz / 178.63.110.201) You can use dig -x 178.63.110.201 to verify this.
I’m not sure if it takes time for it to be working but let me know thank you :3
What do the postfix log files say? Why must we always ask you guys to do the obvious things? 
With dig we can only check incoming ports open, but not outgoing, that you must do… Some providers block port 25 outgoing by default.
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esackbauer
port 25 is open i believe, i checked with portchecker and it is open
how do i get logs for postfix?
Doma how do i get logs for postfix?
Really? YOu never logged on with admin account on GUI and found the “Logs” tab?
Doma i checked with portchecker and it is open
If you mean the portchecker.com, once again it checks only inbound, not outbound.
Seems you need a lot to learn…
Another thing: Also make sure all DNS entries are set up properly, especially SPF
esackbauer
oh what lol i can try to access it right now. But my currently network im using blocks the connection to the mail server lol. I will try my best to get it.
I think this is the issue:
24/04/2024, 09:46:33 info connect to alt1.gmail-smtp-in.l.google.com[2a00:1450:4013:c16::1b]:25: Network is unreachable
24/04/2024, 09:46:32 info connect to gmail-smtp-in.l.google.com[64.233.167.26]:25: Connection timed out
24/04/2024, 09:46:10 info connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c0a::1b]:25: Network is unreachable
24/04/2024, 09:46:09 info 314F841E4B: from=payments@c-core.xyz, size=942, nrcpt=1 (queue active)
24/04/2024, 09:46:02 info connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c0a::1b]:25: Network is unreachable
24/04/2024, 09:46:01 info disconnect from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248] ehlo=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=6
24/04/2024, 09:46:01 info 8C11B41E4D: from=payments@c-core.xyz, size=921, nrcpt=1 (queue active)
24/04/2024, 09:45:58 info 8C11B41E4D: message-id=<44-6628c700-1-66e12d00@88244398>
24/04/2024, 09:45:58 info 8C11B41E4D: replace: header Received: from 7810430316b6 (mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network [172.22.1.248])??(Authenticated sender: payments@c-core.xyz)??by mail.c-core.xyz (Postcow) with ESMTPA i from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248]; from=payments@c-core.xyz to=teeyaim@gmail.com proto=ESMTP helo=<7810430316b6>: Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPA id 8C11B41E4D??for teeyaim@gmail.com; Wed, 24 Apr 2024 08:45:53 +0000 (UTC)
24/04/2024, 09:45:58 info 8C11B41E4D: client=mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248], sasl_method=PLAIN, sasl_username=payments@c-core.xyz
24/04/2024, 09:45:53 info discarding EHLO keywords: CHUNKING
24/04/2024, 09:45:53 info connect from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248]
24/04/2024, 09:44:50 info statistics: max cache size 1 at Apr 24 08:41:29
24/04/2024, 09:44:50 info statistics: max connection count 1 for (smtpd:18.209.86.113) at Apr 24 08:41:29
24/04/2024, 09:44:50 info statistics: max connection rate 1/60s for (smtpd:18.209.86.113) at Apr 24 08:41:29
I think this is the issue:
24/04/2024, 09:46:33 info connect to alt1.gmail-smtp-in.l.google.com[2a00:1450:4013:c16::1b]:25: Network is unreachable
24/04/2024, 09:46:32 info connect to gmail-smtp-in.l.google.com[64.233.167.26]:25: Connection timed out
24/04/2024, 09:46:10 info connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c0a::1b]:25: Network is unreachable
24/04/2024, 09:46:09 info 314F841E4B: from=payments@c-core.xyz, size=942, nrcpt=1 (queue active)
24/04/2024, 09:46:02 info connect to gmail-smtp-in.l.google.com[2a00:1450:400c:c0a::1b]:25: Network is unreachable
24/04/2024, 09:46:01 info disconnect from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248] ehlo=1 auth=1 mail=1 rcpt=1 data=1 quit=1 commands=6
24/04/2024, 09:46:01 info 8C11B41E4D: from=payments@c-core.xyz, size=921, nrcpt=1 (queue active)
24/04/2024, 09:45:58 info 8C11B41E4D: message-id=<44-6628c700-1-66e12d00@88244398>
24/04/2024, 09:45:58 info 8C11B41E4D: replace: header Received: from 7810430316b6 (mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network [172.22.1.248])??(Authenticated sender: payments@c-core.xyz)??by mail.c-core.xyz (Postcow) with ESMTPA i from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248]; from=payments@c-core.xyz to=teeyaim@gmail.com proto=ESMTP helo=<7810430316b6>: Received: from [127.0.0.1] (localhost [127.0.0.1]) by localhost (Mailerdaemon) with ESMTPA id 8C11B41E4D??for teeyaim@gmail.com; Wed, 24 Apr 2024 08:45:53 +0000 (UTC)
24/04/2024, 09:45:58 info 8C11B41E4D: client=mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248], sasl_method=PLAIN, sasl_username=payments@c-core.xyz
24/04/2024, 09:45:53 info discarding EHLO keywords: CHUNKING
24/04/2024, 09:45:53 info connect from mailcowdockerized-sogo-mailcow-1.mailcowdockerized_mailcow-network[172.22.1.248]
24/04/2024, 09:44:50 info statistics: max cache size 1 at Apr 24 08:41:29
24/04/2024, 09:44:50 info statistics: max connection count 1 for (smtpd:18.209.86.113) at Apr 24 08:41:29
24/04/2024, 09:44:50 info statistics: max connection rate 1/60s for (smtpd:18.209.86.113) at Apr 24 08:41:29
oops network at school error moments lol anyways it sent it twice
esackbauer
for the dns records, can you check c-core.xyz on cloudflare?
I can add you as dns viewer on cloudflare, i just need your email to add
esackbauer
how do i go on about allowing outgoings? or check it anyways:
I have used the command
ufw allow 22,25,80,110,143,443,465,587,993,995,4190/tcp
ufw enable
[unknown] btw i used dig -x to check the rDNS
[unknown] the issue i think i can see is that the postfix trying to use IPv6 but my vps only have IPv4 so i will try to change it
Doma is that the postfix trying to use IPv6
No that is not your issue, because IPv4 is also tried:
24/04/2024, 09:46:32 info connect to gmail-smtp-in.l.google.com[64.233.167.26]:25: Connection timed out
A problem could be that you have not set up DNS entries for IPv6.
Still you could try to disable IPv6:
Disable IPv6 - mailcow: dockerized documentation docs.mailcow.email
Seems like you need to have your provider unblock port 25 outgoing for you.
esackbauer ok i will get my host provider to unblock outgoing port 25. And i have disabled IPv6 with that exact same documentation, thank you now i must wait lol. So this is why ovh works fine
esackbauer My host have unblocked port 25. I will try now…
it works my host fixed the issue :3
thanks for everything
