Mailcow Receiving but not sending

baspax1

Hi im new in mailcow, i switched to new server (Hetzner) and mailcow to avoid deliverability problems that i had with contabo vps and plesk email services,
i follow the instructions as per mailcow documentation for ubuntu installation,
But i spend over 4 hours to fix the problem that not Sending emails, i cant understant why happened that,
Im only receiving but not sending.

Im using hetzner server with cloudflare.
I have already enter reverse dns in primary ip ,
i installed firewall : https://www.awesomescreenshot.com/image/35701406?key=1b38c0ebeceb49e5086d440a0e492d40
i did cloudflare entries:
https://www.awesomescreenshot.com/image/35701457?key=4339b3351d5c7ff4a02d8a1f06a9bd11

But still not sending im getting error like :
https://www.awesomescreenshot.com/image/35701512?key=a536f19a83cafb792b71fcf443cb34ba

The weird think is that when i try to send it to myself then im getting the message

MAGIC

Hetzner is blocking port 25 outbound for the first month
https://docs.hetzner.com/cloud/servers/faq/#why-can-i-not-send-any-mails-from-my-server

baspax1

@MAGIC
Can you help me where i can change the 25 to 587 ? is the correct section that im viewing?

HTTP_PORT=80
HTTP_BIND=

HTTPS_PORT=443
HTTPS_BIND=

# ------------------------------
# Other bindings
# ------------------------------
# You should leave that alone
# Format: 11.22.33.44:25 or 12.34.56.78:465 etc.

SMTP_PORT=25
SMTPS_PORT=465
SUBMISSION_PORT=587
IMAP_PORT=143
IMAPS_PORT=993
POP_PORT=110
POPS_PORT=995
SIEVE_PORT=4190
DOVEADM_PORT=127.0.0.1:19991
SQL_PORT=127.0.0.1:13306
SOLR_PORT=127.0.0.1:18983
REDIS_PORT=127.0.0.1:7654

pkernstock

TCP/25 is the standard port to deliver emails between servers. There’s no point in changing it, if you ever would like to deliver emails successfully to external servers. You need to get this port unblocked.

baspax1

@pkernstock
So port 25 cant change, hetzner says:
https://prnt.sc/WEdYkC2muNaJ
are they serious now? I paid a server to have a working mails, not to have more troubles and must whait one month!

i cant believe that dont have other way to send a simple mail, isnt so much hard.. or something didnt get

MAGIC

They can unblock it, maybe read the docs I sent you. They block it so spammers won’t buy a cheap cloud server, spamming around for 1h and give the server back.

baspax1

MAGIC
I already read the docs thats why i asking how to use the 587 that isnt working for me, also hetzner support as you can see on screenshot says that must whait 1 month ,
So i want to make it clealr if i cant make it work before one month with hetzner, to try again Contabo.
But with Contabo i have bad experience with reputation of ips and black lists.