Right,
2024-08-26 11:02:45 0 [Note] Starting MariaDB 10.5.22-MariaDB source revision 7e650253dc488debcb0898ebe6d385bf6dfa3656 as process 992
2024-08-26 11:02:45 0 [Note] InnoDB: Uses event mutexes
2024-08-26 11:02:45 0 [Note] InnoDB: Compressed tables use zlib 1.2.11
2024-08-26 11:02:45 0 [Note] InnoDB: Number of pools: 1
2024-08-26 11:02:45 0 [Note] InnoDB: Using ARMv8 crc32 + pmull instructions
2024-08-26 11:02:45 0 [Note] InnoDB: Using Linux native AIO
2024-08-26 11:02:45 0 [Note] InnoDB: Initializing buffer pool, total size = 1073741824, chunk size = 134217728
2024-08-26 11:02:45 0 [Note] InnoDB: Completed initialization of buffer pool
2024-08-26 11:02:45 0 [Note] InnoDB: 128 rollback segments are active.
2024-08-26 11:02:45 0 [Note] InnoDB: Creating shared tablespace for temporary tables
2024-08-26 11:02:45 0 [Note] InnoDB: Setting file './ibtmp1' size to 12 MB. Physically writing the file full; Please wait ...
2024-08-26 11:02:45 0 [Note] InnoDB: File './ibtmp1' size is now 12 MB.
2024-08-26 11:02:45 0 [Note] InnoDB: 10.5.22 started; log sequence number 658220; transaction id 1920
2024-08-26 11:02:45 0 [Note] InnoDB: Loading buffer pool(s) from /var/lib/mysql/ib_buffer_pool
2024-08-26 11:02:45 0 [Note] Plugin 'FEEDBACK' is disabled.
2024-08-26 11:02:45 0 [Note] Server socket created on IP: '::1'.
2024-08-26 11:02:45 0 [Note] InnoDB: Buffer pool(s) load completed at 240826 11:02:45
2024-08-26 11:02:46 0 [Warning] 'proxies_priv' entry '@% root@mail.example.com' ignored in --skip-name-resolve mode.
2024-08-26 11:02:46 0 [Note] Reading of all Master_info entries succeeded
2024-08-26 11:02:46 0 [Note] Added new Master_info '' to hash table
2024-08-26 11:02:46 0 [Note] /usr/libexec/mariadbd: ready for connections.
Version: '10.5.22-MariaDB' socket: '/var/lib/mysql/mysql.sock' port: 3306 MariaDB Server
that's my log.
But I do get the delays just after receiving the first mail.