Email sending issue (was: URGENT)

[mmtrade]

@BrutalBirdie Please see attached if everything is okay

I have restarted the server and it is still not working

[mmtrade]

I still have thesame problem and the mail is working from what i can see here

[mmtrade]

See what the error message but it is not blacklisted on spamhouse

when did all these measures start because I never experienced with cloudrun before

[mmtrade]

[mmtrade]

when i try to test sending why does it show me another IP???

[nebulon]

Here it would connect locally, trying to send out a mail via the local mail service. Is your mail service running?

[mmtrade]

it is not connecting.. i tried using thrid party services but it does not connect

[nebulon]

What is not connecting where? I was only referring to the test email sending, to clarify why in this case you are seeing a local IP address.

[mmtrade]

@nebulon Well that is what i do not understand whats going on??

How can I rectify this?

Everything is okay but the mail is not sending or receiving. This has nothing to do with my service provider.

[jdaviescoates]

In a post on an originally unrelated thread about IPv6 issues @Gengar posted this link https://www.spamhaus.com/resource-center/successfully-accessing-spamhauss-free-block-lists-using-a-public-dns/ which I think explains what's going on with all these false positive spamhaus issues people are having:

The TL;DR seems to be: fill in this form https://www.spamhaus.com/free-trial/sign-up-for-a-free-data-query-service-account/

[nebulon]

@mmtrade are you able to connect to your mails service, if you run telnet via SSH on your server?

telnet 172.18.30.4 2525

[d19dotca]

@mmtrade said in URGENT:

@nebulon Well that is what i do not understand whats going on??

How can I rectify this?

Everything is okay but the mail is not sending or receiving. This has nothing to do with my service provider.

When you say it isn’t sending or receiving… what happens when you try to send email exactly? And for receiving… are the senders getting a bounce back message? If yes, what does the bounce back say?

When you try to send… are you getting an automated error response back? Is your mail client showing a failure to connect to the SMTP server?

We need more information for anyone to help.

Are you certain your DNS records show the correct IP of your server for mail.{your domain.tld} and was that changed recently at all?

Is it possible your IP address is intermittently being blocklisted where it is showing listed and then later on is showing fine, and keeps flip flopping like that perhaps? The blocklist alert in Cloudron has no bearing on your actual mail functionality, it especially won’t have anything to do with receiving mail from others. If on a blocklist it still won’t impact your ability to send unless the receiving end is blocking it due to being on the blocklist, or may be delivered but found in spam boxes instead.

[mmtrade]

@mmtrade @nebulon @d19dotca

I deleted my whole server and started the reinstallation process again with a different host. Now it started working and sending mails. When i started my campaign, I noticed i could not send up to 1000 emails before this issue started again. I am being blocked and my emails will not receive or send. when i try to do a test it does not work and it still keeps showing me the attached. Everything just worked fine when i started the process again but i do not know why after some time i am being blocked....

Please i need answers to this urgently because I am loosing my mind.

I bet you if i start it all over again it will work and after some time it will stop working

whats going on and is this a new update with cloudrun

i have contacted VPS server provider and actually they do not block or alter any ports so this has to be a cloudron issue. If so why would it work then later stop

Is there any restrictions with this new upgraded cloudron??? the other versions never did this before. It was easy and fun

[mmtrade]

see attached i changed host names

[d19dotca]

@mmtrade said in URGENT:

Now it started working and sending mails. When i started my campaign, I noticed i could not send up to 1000 emails before this issue started again. I am being blocked and my emails will not receive or send. when i try to do a test it does not work and it still keeps showing me the attached. Everything just worked fine when i started the process again but i do not know why after some time i am being blocked....

This definitely sounds like rate limiting being done somewhere if you get up to 1000 emails and then suddenly you can't send any more. But I'm not sure why you can't receive emails either. This feels like something to do with the host you're running with, but if they say they don't do that then I'm not so sure where else it could come from.

What do the mail service logs show? Does the issue happen even after you restart the server or restart the mail service? If yes, then that would seem like something outside of Cloudron, but if the issue is then resolved after restarting then perhaps something else within Cloudron that's affecting things. Best bet to help narrow it down is to show the logs from the mail server (redact sensitive info like email addresses though of course). You may feel safer sending those logs into Cloudron Support email instead from an alternative address.

[mmtrade]

My bad it sent more than 1000 but it was just an odd number. I think about 5436 emails to be precise. the last one sent around 10k plus.

the random changes in sending emails makes it suspicious.

However at first it was the IP spamhous block issue which got resolved and still it did not work moving forward before i reinstalled it and set another host to it.

Does it mean that cloudrun has detected the IP? what do you need from me to test and know cloudrun is not associated with this issue?

What do the mail service logs show? I cannot send emails out to know this. If you know how to get this let me know. I will post what you need me to on forum.

Even when i restart the server.. the issue is still there.

Tell me what to do

[mmtrade]

@d19dotca @BrutalBirdie @jdaviescoates

My bad it sent more than 1000 but it was just an odd number. I think about 5436 emails to be precise. the last one sent around 10k plus.

the random changes in sending emails makes it suspicious.

However at first it was the IP spamhous block issue which got resolved and still it did not work moving forward before i reinstalled it and set another host to it.

Does it mean that cloudrun has detected the IP? what do you need from me to test and know cloudrun is not associated with this issue?

What do the mail service logs show? I cannot send emails out to know this. If you know how to get this let me know. I will post what you need me to on forum.

Even when i restart the server.. the issue is still there.

Tell me what to do

[d19dotca]

@mmtrade said in URGENT:

What do the mail service logs show? I cannot send emails out to know this. If you know how to get this let me know. I will post what you need me to on forum.

In Cloudron, you click on Services page and then the log icon for the mail container. Then export the logs (in case the issue isn't most recently seen in the logs).

[nebulon]

@mmtrade since you are sending out lots of emails and probably within a very short time, you pretty much have to use some external email relay, otherwise your Cloudron's IP will end up in blocklists and gets flagged, at which point it is hard to build up trust with other email providers for that IP again. All kinds of issues will come up once the IP of the sending email server (your Cloudron) gets a bad reputation and the errors other mail providers give aren't always too helpful, dependin gon their spam protection strategy.

This is bound to your IP btw, so restart a server or so won't help.

Basically for non-transaction emails you want to use one of the supported relays https://docs.cloudron.io/email/#relay-outbound-mails there is nothing we can do much on the platform code side unfortunately.

[mmtrade]

@d19dotca

you mean this??