[Bug] Appflowy_cloud tried to connect to SMTP server without any reason.

[henri9813]

Describe the bug

REgulary, the container appflowy_cloud tried to connect to my TLS smtp server ( port 587 ) but does nothing ?

Oct 29 22:29:13 fesfes.gladhost.cloud postfix/smtpd[491727]: connect from gxo-1001.gladhost.cloud[1.1.1.1]
Oct 29 22:29:13 fesfes.gladhost.cloud postfix/smtpd[491727]: lost connection after UNKNOWN from gxo-1001.gladhost.cloud[137.74.157.41]
Oct 29 22:29:13 fesfes.gladhost.cloud postfix/smtpd[491727]: disconnect from gxo-1001.gladhost.cloud[1.1.1.1] unknown=0/2 commands=0/2

To Reproduce
Steps to reproduce the behavior:

1. Run appflowy_cloud

Expected behavior
A clear and concise description of what you expected to happen.

The connection is either not started while no mail has to be sent.

Screenshots
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Desktop (please complete the following information):

• OS: [e.g. iOS]
• Browser [e.g. chrome, safari]
• Version [e.g. 22]

Additional context

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[henri9813]

The connection attempt occurred every minutes.

Oct 29 21:58:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: connect from gxo-1001.gladhost.cloud[137.74.157.41]
Oct 29 21:58:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: lost connection after UNKNOWN from gxo-1001.gladhost.cloud[137.74.157.41]
Oct 29 21:58:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: disconnect from gxo-1001.gladhost.cloud[137.74.157.41] unknown=0/2 commands=0/2
ct 29 21:59:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: connect from gxo-1001.gladhost.cloud[137.74.157.41]
Oct 29 21:59:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: lost connection after UNKNOWN from gxo-1001.gladhost.cloud[137.74.157.41]
Oct 29 21:59:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: disconnect from gxo-1001.gladhost.cloud[137.74.157.41] unknown=0/2 commands=0/2
Oct 29 22:00:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: connect from gxo-1001.gladhost.cloud[137.74.157.41]
Oct 29 22:00:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: lost connection after UNKNOWN from gxo-1001.gladhost.cloud[137.74.157.41]
Oct 29 22:00:08 gxo-1005.gladhost.cloud postfix/smtpd[490077]: disconnect from gxo-1001.gladhost.cloud[137.74.157.41] unknown=0/2 commands=0/2

[khorshuheng]

One situation where i have seen this happening, is when AppFlowy Cloud performs any action (magic link, invite user to workspace, invite user to appflowy, notify user when notion import is completed) that requires smtp server, but unable to connect to the server (eg. if the port supports STARTTLS instead of TLS). In which case, the server will keep retrying, in roughly a minute interval.

I am not familiar with postfix myself, so i will have to research more about it.

[henri9813]

Hello,

The smtp connection is okay because when I invite someone for example, the mail is successfully sent...

However, I have no logs on appflowy side. Which container should I look ?

[khorshuheng]

If there is any log, it should be on Appflowy cloud. Could you give more information on the SMTP setup (i.e. configuration of postfix), so that I can try to see if I can reproduce the issue?

[henri9813]

Hello,

Postfix is configured in TLS ( port 587 ) with authentication.

There is not any special configuration.

My problem is I don't have any logs in appflowy_cloud.( except a warning which happen every hours ) but nothing which trigger every minutes.