No connection to any server

[selfauthor]

I'm trying to connect to different servers. Result - no connection. Tried with ports 25, 587, 2525. Nothing works.
Here is the result of one of the attempts:
Array[2]
[0] => Array[2]
[selfauthor@gmail.com] => false
[domains] => Array[1]
[gmail.com] => Array[2]
[users] => Array[1]
[0] => "selfauthor"
[mxs] => Array[6]
[gmail-smtp-in.l.google.com] => "5"
[alt1.gmail-smtp-in.l.google.com] => "10"
[alt2.gmail-smtp-in.l.google.com] => "20"
[alt3.gmail-smtp-in.l.google.com] => "30"
[alt4.gmail-smtp-in.l.google.com] => "40"
[gmail.com] => "0"
[1] => Array[20]
[0] => "[2025-04-09T15:04:29.408834+0000] Building MX records for domain: gmail.com"
[1] => "[2025-04-09T15:04:29.409218+0000] MX records (gmail.com): Array
(
[gmail-smtp-in.l.google.com] => 5
[alt1.gmail-smtp-in.l.google.com] => 10
[alt2.gmail-smtp-in.l.google.com] => 20
[alt3.gmail-smtp-in.l.google.com] => 30
[alt4.gmail-smtp-in.l.google.com] => 40
[gmail.com] => 0
)
"
[2] => "[2025-04-09T15:04:29.409285+0000] Connecting to gmail-smtp-in.l.google.com:25 (timeout: 10)"
[3] => "[2025-04-09T15:04:39.578215+0000] Connect failed: Connection timed out, error number: 110, host: gmail-smtp-in.l.google.com:25"
[4] => "[2025-04-09T15:04:39.578286+0000] Unable to connect. Exception caught: Cannot open a connection to remote host (gmail-smtp-in.l.google.com:25)"
[5] => "[2025-04-09T15:04:39.578305+0000] Connecting to alt1.gmail-smtp-in.l.google.com:25 (timeout: 10)"
[6] => "[2025-04-09T15:04:49.641301+0000] Connect failed: Connection timed out, error number: 110, host: alt1.gmail-smtp-in.l.google.com:25"
[7] => "[2025-04-09T15:04:49.641351+0000] Unable to connect. Exception caught: Cannot open a connection to remote host (alt1.gmail-smtp-in.l.google.com:25)"
[8] => "[2025-04-09T15:04:49.641360+0000] Connecting to alt2.gmail-smtp-in.l.google.com:25 (timeout: 10)"
[9] => "[2025-04-09T15:04:59.684593+0000] Connect failed: Connection timed out, error number: 110, host: alt2.gmail-smtp-in.l.google.com:25"
[10] => "[2025-04-09T15:04:59.684654+0000] Unable to connect. Exception caught: Cannot open a connection to remote host (alt2.gmail-smtp-in.l.google.com:25)"
[11] => "[2025-04-09T15:04:59.684669+0000] Connecting to alt3.gmail-smtp-in.l.google.com:25 (timeout: 10)"
[12] => "[2025-04-09T15:05:09.731295+0000] Connect failed: Connection timed out, error number: 110, host: alt3.gmail-smtp-in.l.google.com:25"
[13] => "[2025-04-09T15:05:09.731371+0000] Unable to connect. Exception caught: Cannot open a connection to remote host (alt3.gmail-smtp-in.l.google.com:25)"
[14] => "[2025-04-09T15:05:09.731389+0000] Connecting to alt4.gmail-smtp-in.l.google.com:25 (timeout: 10)"
[15] => "[2025-04-09T15:05:19.807906+0000] Connect failed: Connection timed out, error number: 110, host: alt4.gmail-smtp-in.l.google.com:25"
[16] => "[2025-04-09T15:05:19.807954+0000] Unable to connect. Exception caught: Cannot open a connection to remote host (alt4.gmail-smtp-in.l.google.com:25)"
[17] => "[2025-04-09T15:05:19.807963+0000] Connecting to gmail.com:25 (timeout: 10)"
[18] => "[2025-04-09T15:05:29.884573+0000] Connect failed: Connection timed out, error number: 110, host: gmail.com:25"
[19] => "[2025-04-09T15:05:29.884628+0000] Unable to connect. Exception caught: Cannot open a connection to remote host (gmail.com:25)"

I think that mx servers have tightened their spam protection and are denying connections to anyone who is not an smtp server. How can I break through this protection?