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2

Postfix is not being particularly aggressive. It's trying to deliver mail in accordance with SMTP and various best practices. This is Yahoo's fault. Yahoo has extremely low limits on simultaneous recipients of a message from a single sender. I see this occur with a small 500-member list with only a couple of dozen Yahoo addresses on it. The contents of ...


5

If DNS resolution simply times out and a response never comes back from the DNS server at all, or the return is SERVFAIL, then the message is supposed to be queued and tried again later. If DNS resolution returns NXDOMAIN (the name doesn't exist) then the message is supposed to be returned immediately. See RFC 5321, section 5.1: The lookup first ...


0

Try this Set-PowerCLIConfiguration -Scope Session -WebOperationTimeoutSeconds -1 Credit


2

FTP distinguishes between the control port (21) and the data ports. The latter is used for the transfer of the files and directory listing and which ports are used gets dynamically decided by the server in passive mode or the client in active mode. So if you just have a simple firewall which can only do filtering by port you need to either open all ports ...


0

I know this is an old question, but I'm posting in case anyone else is looking for a better/different answer. I've been having a similar problem, but when installing upgrades. Ours takes a long time to start as it is part of a Galera cluster and needs to copy over what it missed while it was down. To start run: MYSQLD_STARTUP_TIMEOUT=900 /etc/init.d/mysql ...



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