carlsson
Basic Pleskian
- Server operating system version
- Ubuntu 20.04
- Plesk version and microupdate number
- Version 18.0.58 Update #2
Today was the third time I experienced the following, and with different networks:
- Suddenly I can't connect to the SMTP server.
- No devices on the same network can use that SMTP server.
- Connecting to another network (like my cellular) works normally.
- I have tried different accounts, all is on the same Plesk and behaves identically.
- Waiting an hour and the problem vanish.
The first time I noticed this behavior was last week when I helped my brother in law setting up his copier. That involved a lot of testing because it didn't work at the first attempt, and after a while SMTP was blocked. Connecting to my cellular showed no problems of sending emails.
Second time was during this weekend, also after a lot of testing, and just now it happened again, also after testing (see my other thread).
When connecting to my cellular it works as it should.
I get the feeling that my Plesk Mail server bans my IP during a period. I can't find any info about this in Plesk admin though, and my IP is not mentioned in the IP address banning logs... I whitelisted my IP to test, but there was no difference in behavior (my IP is a DHCP from my ISP).
The only common factor is my mail server. Everything else works.
Any ideas what this is all about!?
- Suddenly I can't connect to the SMTP server.
- No devices on the same network can use that SMTP server.
- Connecting to another network (like my cellular) works normally.
- I have tried different accounts, all is on the same Plesk and behaves identically.
- Waiting an hour and the problem vanish.
The first time I noticed this behavior was last week when I helped my brother in law setting up his copier. That involved a lot of testing because it didn't work at the first attempt, and after a while SMTP was blocked. Connecting to my cellular showed no problems of sending emails.
Second time was during this weekend, also after a lot of testing, and just now it happened again, also after testing (see my other thread).
When connecting to my cellular it works as it should.
I get the feeling that my Plesk Mail server bans my IP during a period. I can't find any info about this in Plesk admin though, and my IP is not mentioned in the IP address banning logs... I whitelisted my IP to test, but there was no difference in behavior (my IP is a DHCP from my ISP).
The only common factor is my mail server. Everything else works.
Any ideas what this is all about!?