Important messages ???
in Bugs
2018-11-21 00:59: Miof Mela@a.buygsalist.com: POP3 Login failed - -ERR [AUTH] Authentication failed.
How do you fix it?
This is the first time

Comments
I means gsa ser could not login to the mail account, this could be because of a connection issue, such as when you are using proxies or it could be there is a network issue at the mail server or your ip is banned at the mail server.
what to do:
Open the project, go to mail tab and test all, if some fail, then test the ones that failed again.
if all fail then contact me with your IP address, i will tell you if there is a server issue or a firewall issue.
This week there was 2 network events at our Dallas data centre, first was on Monday 19th and the 2nd one was for about 2 hours on 22 Nov.
best is just test the email 2 - 3 times, if continuously fail contact me