@jeff_1162
thank's for contribution
The error 554 represents an "error with remote server". It is very likely that this is a problem that could have been fixed in the meantime. Please try again and if the problem persists, please also check if an update is available in your app store.
Didn't you get a mail that you have to adjust your settings on the mail program? I think you are affected by this.
Here is the self-care help:
Set up a Bluewin e-mail account and resolve problems | Swisscom
If you need support, you are welcome to call the hotline 0800 800 800 and use the MyService service, which is subject to a fee.
Remarks:
Well, the IP itself is not yet on the block lists in general.
On this one, which Bluewin apparently also uses here.
A missing or incorrect PTR entry for the IP on the mail server is given as information.
So if you're running it yourself, you'll have to fix it.
This blocklist lists all IP addresses that are unlikely to be used by a legitimate mail server. Legitimate mail servers should use a static IP address with a non-generic PTR record and that reflect the host and domain name of the mail server and ideally should match the forward lookup for the same name (FCrDNS).
It is designed to catch botnet traffic, compromised hosts, hijacked IP space and compute/VPS hosts.
This list is generated by running a reverse DNS lookup for every IPv4 IP address and lists IPs with:
- no PTR record
- PTR record with an invalid top-level domain (TLD)
- PTR record contains part of the IP address (e.g. 127-0-0-1.example.com)
- PTR indicates dynamic IP (e.g. subdomain contains: dynamic, dyn, cable, generic-host, nothing, dsl, dial, dhcp, unallocated, broadband, internetdsl, gprs, no-dns-yet, unassigned, unknown, ipngn,...)
Any host containing smtp, mail, mx, mta is automatically excluded.
Please do not request a delist from this zone unless you are running an email server on this address. Being listed in this zone will not affect your ability to send email unless there is a mail server running on it.