I am relatively familiar with Debian and have been trying to setup a mail server with this tutorial.
Now i have gone through all the comments provided on the website to try route out the problem but they do not seem to work. I have come accross some similar problems on serverfault but they too do not work. My greatest challenge is truely making heads or tails of the stack trace.
I see a lot of warnings and some errors and cant tell what the route cause is. The biggest challenge is that this is my first time dealing with anything mail related/smtp.
The first error I resolved was this
Fatal: Error reading configuration: Invalid settings: postmaster_address setting not given
by adding "postmaster_address = postmaster@example.com" to the file /etc/dovecot/conf.d/15-lda.conf.
Note
Based on numerous posts the file to which this line is added to varies.
Now here comes the long stack trace i can't make sense of
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: warning: cannot get RSA certificate from file /etc/ssl/certs/dovecot.pem: disabling TLS support
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: warning: TLS library problem: 28713:error:02001002:system library:fopen:No such file or directory:bss_file.c:398:fopen('/etc/ssl/certs/dovecot.pem','r'):
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: warning: TLS library problem: 28713:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:400:
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: warning: TLS library problem: 28713:error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib:ssl_rsa.c:722:
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: warning: cannot get RSA certificate from file /etc/ssl/certs/dovecot.pem: disabling TLS support
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: warning: TLS library problem: 28714:error:02001002:system library:fopen:No such file or directory:bss_file.c:398:fopen('/etc/ssl/certs/dovecot.pem','r'):
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: warning: TLS library problem: 28714:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:400:
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: warning: TLS library problem: 28714:error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib:ssl_rsa.c:722:
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: warning: hostname xxx.xxx.xx.x.hostname.com does not resolve to address xxx.xxx.xx.x: No address associated with hostname
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: connect from unknown[xxx.xxx.xx.x]
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: warning: hostname xxx.xxx.xx.x.hostname.com does not resolve to address xxx.xxx.xx.x: No address associated with hostname
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: connect from unknown[xxx.xxx.xx.x]
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: warning: cannot get RSA certificate from file /etc/ssl/certs/dovecot.pem: disabling TLS support
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: warning: TLS library problem: 28718:error:02001002:system library:fopen:No such file or directory:bss_file.c:398:fopen('/etc/ssl/certs/dovecot.pem','r'):
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: warning: TLS library problem: 28718:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:400:
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: warning: TLS library problem: 28718:error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib:ssl_rsa.c:722:
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: warning: cannot get RSA certificate from file /etc/ssl/certs/dovecot.pem: disabling TLS support
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: warning: TLS library problem: 28719:error:02001002:system library:fopen:No such file or directory:bss_file.c:398:fopen('/etc/ssl/certs/dovecot.pem','r'):
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: warning: TLS library problem: 28719:error:20074002:BIO routines:FILE_CTRL:system lib:bss_file.c:400:
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: warning: TLS library problem: 28719:error:140DC002:SSL routines:SSL_CTX_use_certificate_chain_file:system lib:ssl_rsa.c:722:
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: warning: hostname xxx.xxx.xx.x.hostname.com does not resolve to address xxx.xxx.xx.x: No address associated with hostname
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: connect from unknown[xxx.xxx.xx.x]
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: warning: hostname xxx.xxx.xx.x.hostname.com does not resolve to address xxx.xxx.xx.x: No address associated with hostname
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: connect from unknown[xxx.xxx.xx.x]
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: improper command pipelining after EHLO from unknown[xxx.xxx.xx.x]: QUIT\r\n
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28713]: disconnect from unknown[xxx.xxx.xx.x]
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: improper command pipelining after EHLO from unknown[xxx.xxx.xx.x]: QUIT\r\n
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28714]: disconnect from unknown[xxx.xxx.xx.x]
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: improper command pipelining after EHLO from unknown[xxx.xxx.xx.x]: QUIT\r\n
Jan 9 00:27:19 xxxxxxxx postfix/smtpd[28718]: disconnect from unknown[xxx.xxx.xx.x]
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: improper command pipelining after EHLO from unknown[xxx.xxx.xx.x]: QUIT\r\n
Jan 9 00:27:19 xxxxxxxx postfix/submission/smtpd[28719]: disconnect from unknown[xxx.xxx.xx.x]
